## Summary of the Pull Request
Since the days immemorial of the Terminal, the TermControl has auto-focused itself when it finalizes its layout. This has led to the problem that `wt ; sp ; sp ; sp...` ends up focusing one of these panes at random.
This PR fixes this issue by getting rid of the auto-focusing. Panes now manually get focused when created. We manually focus the active pane when a commandline is dispatched. since we're internally tracking "active" separate from "focused", this ends up working as you'd hope.
## References
## PR Checklist
* [x] Closes#6586
* [x] I work here
* [ ] Tests added/passed
* [n/a] Requires documentation to be updated
## Detailed Description of the Pull Request / Additional comments
I also had to turn the cursor off by default. Most `TermControl`s would never get the `LostFocus` event, so their cursors would get left `On`, and that's not right.
## Validation Steps Performed
I've run the following things a bunch of times to make sure they work:
* `wtd sp ; sp ; sp`
* `wtd sp ; sp ; sp ; fp -t 0`
* `newTab`
* `splitPane`
* use the command palette to do the above as well
Where the result used to be random (cases 1 & 2), the result is exactly what you'd expect now.
It doesn't work at all for
```
wtd sp ; sp ; sp ; mf left
```
Presumably because we can't `move-focus` directionally during startup. However, that doesn't work _today_ either, so it's not making it worse. Just highlights that single scenario doesn't work right.
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