Implements `_MakePane` in `TerminalPage`, which creates a pane that then can be used to pass into another pane to split or to create a new tab with. Places where we split pane or create a new tab now use `_MakePane`.
## PR Checklist
* [x] Closes#11021
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [x] I work here
## Validation Steps Performed
Stands up to manual testing with multiple new pane/new tab commands as well as startup actions
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
Try to save the working directory if we know what it is (just copied what was done in duplicating a pane). I overlooked this in my original implementation that always used the settings StartingDirectory.
<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
## References
#9800
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [ ] Closes #xxx
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [ ] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
Tried setting the working directory using the OSC 9;9 escape and confirmed that the directory saves correctly.
This commit adds the ability to interact with subtrees of panes.
Have you ever thought that you don't have enough regression testing to
do? Boy do I have the PR for you! This breaks all kinds of assumptions
about what is or is not focused, largely complicated by the fact that a
pane is not a proper control. I did my best to cover as many cases as I
could, but I wouldn't be surprised if there are some things broken that
I am unaware of.
Done:
- Add `parent` and `child` movement directions to move up and down the
tree respectively
- When a parent pane is selected it will have borders all around it in
addition to any borders the children have.
- Fix focus, swap, split, zoom, toggle orientation, resize, and move to
all handle interacting with more than one pane.
- Similarly the actions for font size changing, closing, read-only, clearing
buffer, and changing color scheme will distribute to all children.
- This technically leaves control focus on the original control in the
focused subtree because panes aren't proper controls themselves. This
is also used to make sure we go back down the same path with the
`child` movement.
- You can zoom a parent pane, and click between different zoomed
sub-panes and it won't unzoom you until you use moveFocus or another
action. This wasn't explicitly programmed behavior so it is probably
buggy (I've quashed a couple at least). It is a natural consequence of
showing multiple terminals and allowing you to focus a terminal and a
parent separately, since changing the active pane directly does not
unzoom. This also means there can be a disconnect between what pane is
zoomed and what pane is active.
## Validation Steps Performed
Tested focus movement, swapping, moving panes, and zooming.
Closes#10733
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
Continuation of https://github.com/microsoft/terminal/pull/10972 to handle multiple windows, requires that to be merged first.
<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
## References
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [x] Also closes#766
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [x] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
Rough changelog:
Normally saving is triggered to occur every 30s, or sooner if a window is created/closed. The existing behavior of saving on last close is maintained to bypass that throttling. The automatic saving allows for crash recovery. Additionally all window layouts will be saved upon taking the `quit` action.
For loading we will check if we are the first window, that there are any saved layouts, and if the setting is enabled, and then depending on if we were given command line args or startup actions.
- create a new window for each saved layout, or
- take the first layout for our self and then a new window for each other layout.
This also saves the layout when the quit action is taken.
Misc changes
- A -s,--saved argument was added to the command line to facilitate opening all of the windows with the right settings. This also means that while a terminal session is running you can do wt -s idx to open a copy of window idx. There isn't a stable ordering of which idx each window gets saved as (it is whatever the iteration order of _peasants is), so it is just a cute hack for now.
- All position calculation has been moved up to AppHost this does mean we need to awkwardly pass around positions in a couple of unexpected places, but no solution was perfect.
- Renamed "Open tabs from a previous session" to "Open windows from a previous session". (not reflected in video below)
- Now save runtime tab color and window names
- Only enabled for non-elevated windows
- Add some change tracking to ApplicationState
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
## Summary of the Pull Request
Adds support for vintage style opacity, on Windows 11+. The API we're using for this exists since the time immemorial, but there's a bug in XAML Islands that prevents it from working right until Windows 11 (which we're working on backporting).
Replaces the `acrylicOpacity` setting with `opacity`, which is a uint between 0 and 100 (inclusive), default to 100.
`useAcrylic` now controls whether acrylic is used or not. Setting an opacity < 100 with `"useAcrylic": false` will use vintage style opacity.
Mouse wheeling adjusts opacity. Whether acrylic is used or not is dependent upon `useAcrylic`.
`opacity` will stealthily default to 50 if `useAcrylic:true` is set.
## PR Checklist
* [x] Closes#603
* [x] I work here
* [x] Tests added/passed
* [x] https://github.com/MicrosoftDocs/terminal/pull/416
## Detailed Description of the Pull Request / Additional comments
Opacity was moved to AppearanceConfig. In the future, I have a mind to allow unfocused acrylic, so that'll be important then.
## Validation Steps Performed
_just look at it_
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
Adds directional modifiers for SplitState and convert those to the appropriate horizontal/vertical when splitting a pane.
<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
## References
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [x] Closes#4340
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [x] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [x] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
"vertical" and "horizontal" splits were removed from `defaults.json`, but code was added to parse those as `right` and `down` respectively. It is also the case that if a user has a custom hotkey for `split: vertical` it will override the default for `split: right`.
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
Split the pane using each of the new directional movements
This commit adds initial support for saving window layout on application
close.
Done:
- Add user setting for if tabs should be maintained.
- Added events to track the number of open windows for the monarch, and
then save if you are the last window closing.
- Saves layout when the user explicitly hits the "Close Window" button.
- If the user manually closed all of their tabs (through the tab x
button or through closing all panes on the tab) then remove any saved
state.
- Saves in the ApplicationState file a list of actions the terminal can
perform to restore its layout and the window size/position
information.
- This saves an action to focus the correct pane, but this won't
actually work without #10978. Note that if you have a pane zoomed, it
does still zoom the correct pane, but when you unzoom it will have a
different pane selected.
Todo:
- multiple windows? Right now it can only handle loading/saving one
window.
- PR #11083 will save multiple windows.
- This also sometimes runs into the existing bug where multiple tabs
appear to be focused on opening.
Next Steps:
- The business logic of when the save is triggered can be adjusted as
necessary.
- Right now I am taking the pragmatic approach and just saving the state
as an array of objects, but only ever populate it with 1, that way
saving multiple windows in the future could be added without breaking
schema compatibility. Selfishly I'm hoping that handling multiple
windows could be spun off into another pr/feature for now.
- One possible thing that can maybe be done is that the commandline can
be augmented with a "--saved ##" attribute that would load from the
nth saved state if it exists. e.g. if there are 3 saved windows, on
first load it can spawn three wt --saved {0,1,2} that would reopen the
windows? This way there also exists a way to load a copy of a previous
window (if it is in the saved state).
- Is the application state something that is planned to be public/user
editable? In theory the user could since it is just json, but I don't
know what it buys them over just modifying their settings and
startupActions.
Validation Steps Performed:
- The happy path: open terminal -> set setting to true -> close terminal
-> reopen and see tabs. Tested with powershell/cmd/wsl windows.
- That closing all panes/tabs on their own will remove the saved
session.
- Open multiple windows, close windows and confirm that the last window
closed saves its state.
The generated file stores a sequence of actions that will be executed to
restore the terminal to its saved form.
References #8324
This is also one of the items on microsoft/terminal#5000Closes#766
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
Make it so you can navigate pane focus without unzooming.
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [x] Closes#7215
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [ ] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
- Slight refactor to bring the MRU pane logic into the `NavigateDirection` function
- The actual zoom behavior was not a problem, the only issue is that because most of the panes weren't in the UI tree I had to disable using the actual sizes. There is nothing wrong with that, since the synthetic sizing is required anyways, but I'm curious what other peoples' thoughts are.
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
This commit adds the ability to target the first pane in the tree,
always.
I wasn't able to find an existing issue for this, it is just a personal
feature for me. I won't be heartbroken if it does not get merged.
As motivation, I frequently have setups where the thing I am primarily
working on is a large pane on the left and everything else is in smaller
panes positioned elsewhere. I like to have one hotkey where I can go to
any pane and then make it the "primary" pane if I am changing what I am
working on or need to focus on another set of code/documentation/etc.
## Validation Steps Performed
Confirmed that the move focus and swap pane variants both affect the
correct pane.
When moving a pane to a new tab previously we removed the event handlers
on it as if we were closing it, but we are just moving it so we need to
keep them.
I tried really hard to make sure all of the events were hooked up
correctly, but I guess I missed these originally since they are normally
created in the Pane constructor.
Closes#11035
## Validation Steps Performed
created panes, moved them to new tabs, confirmed that they close and
ding appropriately.
During startup we do not have real dimensions, so we have to guess what
our dimensions should be based off of the splits.
We'll augment the state of the pane search to also have a size in each
dimension that gets incrementally upgraded as we recurse through the
tree.
References #10978
The original code for settings reload iterated the entire tree of panes
for every profile in the new settings (O(mn)) and constructed a
TerminalSettings object for every profile even if it later went unused.
This implementation:
1. Collects all new profiles keyed by guid
1.a. Adds the "defaults" profile to the map
2. Iterates every pane, just once, and updates its profile if it shows
up in the list by GUID.
I've merged all of the per-tab code into a single loop.
Because of 1.a., this code can now update panes that are hosting the
"base" profile.
Right now, we store GUIDs in panes and most of the functions for interacting
with profiles on the settings model take GUIDs and look up profiles.
This pull request changes how we store and look up profiles to prefer profile
objects. Panes store strong references to their originating profiles, which
simplifies settings lookup for CloseOnExit and the bell settings. In fact,
deleting a pane's profile no longer causes it to forget which CloseOnExit
setting applies to it. Duplicating a pane that is hosting a deleted profile
(#5047) now duplicates the profile, even though it is otherwise unreachable.
This makes the world more consistent and allows us to _eventually_ support panes
hosting profiles that do not have GUIDs that can be looked up in the profile
list. This is a gateway to #6776 and #10669, and consolidating the profile
lookup logic will help with #10952.
PR #10588 introduced TerminalSettings::CreateWithProfile and made
...CreateWithProfileByID a thin wrapper over top it, which looked up the profile
by GUID before proceeding. It has also been removed, as its last caller is gone.
Closes#5047
Add support for acrylic in the titlebar
## PR Checklist
* [x] CLA signed
## Detailed Description of the Pull Request / Additional comments
This seems to be a highly requested feature and seeing as #5772 was closed I thought it made sense to make a PR for this.
## Validation Steps Performed
Checked that acrylic works in both dark and light modes and switching between them still works. Also checked that acrylic in the tab row still works when tabs in titlebar is disabled.
Adds new in-order traversal for MoveFocus and SwapPane actions.
Refactors the Pane methods to share a `NavigateDirection`
implementation.
Closes#10909
A large amount of the churn here is just renaming some of the things for
directional movement to reflect that it might not always be based on the
focused pane. `NextPane` and `PreviousPane` are the functions that
actually select the next/previous pane respectively and are the core
component of this PR.
VALIDATION
Created multiple panes on a tab, and tried both forward and backwards
movements with move-focus and swap-pane.
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
Add functionality to move a pane to another tab. If the tab index is greater than the number of current tabs a new tab will be created with the pane as its root. Similarly, if the last pane on a tab is moved to another tab, the original tab will be closed.
This is largely complete, but I know that I'm messing around with things that I am unfamiliar with, and would like to avoid footguns where possible.
<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
## References
#4587
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [x] Closes#7075
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [x] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [x] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
Things done:
- Moving a pane to a new tab appears to work. Moving a pane to an existing tab mostly works. Moving a pane back to its original tab appears to work.
- Set up {Attach,Detach}Pane methods to add or remove a pane from a pane. Detach is slightly different than Close in that we want to persist the tree structure and terminal controls.
- Add `Detached` event on a pane that can be subscribed to to remove other event handlers if desired.
- Added simple WalkTree abstraction for one-off recursion use cases that calls a provided function on each pane in order (and optionally terminates early).
- Fixed an in-prod bug with closing panes. Specifically, if you have a tree (1; 2 3) and close the 1 pane, then 3 will lose its borders because of these lines clearing the border on both children https://github.com/microsoft/terminal/blob/main/src/cascadia/TerminalApp/Pane.cpp#L1197-L1201 .
To do:
- Right now I have `TerminalTab` as a friend class of `Pane` so I can access some extra properties in my `WalkTree` callbacks, but there is probably a better choice for the abstraction boundary.
Next Steps:
- In a future PR Drag & Drop handlers could be added that utilize the Attach/Detach infrastructure to provide a better UI.
- Similarly once this is working, it should be possible to convert an entire tab into a pane on an existing tab (Tab::DetachRoot on original tab followed by Tab::AttachPane on the target tab).
- Its been 10 years, I just really want to use concepts already.
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
Manual testing by creating pane(s), and moving them between tabs and creating new tabs and destroying tabs by moving the last remaining pane.
## Summary of the Pull Request
This PR causes the Terminal to combine taskbar states at the tab and window level, according to the [MSDN docs for `SetProgressState`](https://docs.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-itaskbarlist3-setprogressstate#how-the-taskbar-button-chooses-the-progress-indicator-for-a-group).
This allows the Terminal's taskbar icon to continue showing progress information, even if you're in a pane/tab that _doesn't_ have progress state. This is helpful for cases where the user may be running a build in one tab, and working on something else in another.
## References
* [`SetProgressState`](https://docs.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-itaskbarlist3-setprogressstate#how-the-taskbar-button-chooses-the-progress-indicator-for-a-group)
* Progress mega: #6700
## PR Checklist
* [x] Closes#10090
* [x] I work here
* [ ] Tests added/passed
* [n/a] Requires documentation to be updated
## Detailed Description of the Pull Request / Additional comments
This also fixes a related bug where transitioning from the "error" or "warning" state directly to the "indeterminate" state would cause the taskbar icon to get stuck in a bad state.
## Validation Steps Performed
<details>
<summary><code>progress.cmd</code></summary>
```cmd
@echo off
setlocal enabledelayedexpansion
set _type=3
if (%1) == () (
set _type=3
) else (
set _type=%1
)
if (%_type%) == (0) (
<NUL set /p =]9;4
echo Cleared progress
)
if (%_type%) == (1) (
<NUL set /p =]9;4;1;25
echo Started progress (normal, 25^)
)
if (%_type%) == (2) (
<NUL set /p =]9;4;2;50
echo Started progress (error, 50^)
)
if (%_type%) == (3) (
@rem start indeterminate progress in the taskbar
@rem this `<NUL set /p =` magic will output the text _without a newline_
<NUL set /p =]9;4;3
echo Started progress (indeterminate, {omitted})
)
if (%_type%) == (4) (
<NUL set /p =]9;4;4;75
echo Started progress (warning, 75^)
)
```
</details>
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
Add the ability to toggle a pane's split direction
- Switch from horizontal to vertical split (and vice versa)
- Propogate new borders through to children.
<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
## References
#10665
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [x] Closes#10665
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [x] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
Ran terminal, created multiple panes in different orientations, ran command through command palate and verified that they displayed properly in the new orientation.
## Summary of the Pull Request
Uses the new logic to find visual neighbors of a pane to find which pane is the target when the move-focus commands are used.
## References
It sounds like this logic will be refined later to meet #4692
## PR Checklist
* [x] Closes#2398
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [ ] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
## Validation Steps Performed
Created a grid of panes and confirmed that focus movement went to the right quadrant instead of just the first child of the sibling.
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
Add functionality to swap a pane with an adjacent (Up/Down/Left/Right) neighbor.
<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
## References
This work potentially touches on: #1000#2398 and #4922
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [x] Closes a component of #1000 (partially, comment), #4922 (partially, `SwapPanes` function is added but not hooked up, no detach functionality)
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [x] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [x] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
Its been a while since I've written C++ code, and it is my first time working on a Windows application. I hope that I have not made too many mistakes.
Work currently done:
- Add boilerplate/infrastructure for argument parsing, hotkeys, event handling
- Adds the `MovePane` function that finds the focused pane, and then tries to find
a pane that is visually adjacent to according to direction.
- First pass at the `SwapPanes` function that swaps the tree location of two panes
- First working version of helpers `_FindFocusAndNeighbor` and `_FindNeighborFromFocus`
that search the tree for the currently focused pane, and then climbs back up the tree
to try to find a sibling pane that is adjacent to it.
- An `_IsAdjacent' function that tests whether two panes, given their relative offsets, are adjacent to each other according to the direction.
Next steps:
- Once working these functions (`_FindFocusAndNeighbor`, etc) could be utilized to also solve #2398 by updating the `NavigateFocus` function.
- Do we want default hotkeys for the new actions?
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
At this point, compilation and manual testing of functionality (with hotkeys) by creating panes, adding distinguishers to each pane, and then swapping them around to confirm they went to the right location.
Visual Studio 2022 Preview recently released the v143 toolchain.
C4189 is now flagging several unused variables, which breaks our build.
## PR Checklist
* [x] I work here
* [x] Tests added/passed
## Validation Steps Performed
* CascadiaPackage builds ✔️
* All tests build ✔️
ConptyConnection has two different failure modes:
1. We failed to initialize the pseudoconsole or create the process
2. The process exited with an error code.
Until this commit, they were treated the same way: closeOnExit=always
would force the pane/tab to be destroyed. This was very bad in case 1,
where we would display a (possibly useful) error message and then
immediately close the window.
This was made even worse by the change in #10045. We removed
startingDirectory validation and promoted it to an error message (so
that we could eventually let the connection handle startingDirectory in
its own way.) This of course revealed that a number of users had set
invalid starting directories… and those users included some who set
closeOnExit to always. Boom: instant "terminal opens and crashes"¹
In this commit, we introduce detection for a connection that fails
before it's been established. When that happens, we will ignore the
user's closeOnExit mode.
¹ It only looks like a crash; it's actually _technically_ functioning
properly.
Closes#10225.
