## Summary of the Pull Request
When we maximize the window, shrink the caption buttons (the min, max, close buttons) down to 32px tall, to be the same height as the `TabRowControl`. This way, the tabs will be flush with the top of the display.
## PR Checklist
* [x] Closes#2541
* [x] I work here
* [ ] Tests added/passed
* [n/a] Requires documentation to be updated
## Detailed Description of the Pull Request / Additional comments
I tried for a couple hours this morning to do this as a `VisualState`. First I tried doing it as one on the TabRow, which I had very little success with. Then, I eventually realized that the TabRow wasn't even responsible for the padding there, it was being created by the fact that the caption buttons were too tall. Again, I tried to use the existing `VisualState`s they have defined for this, but I couldn't figure out how to do that.
I think the visual state solution would be _cleaner_, so if someone knows how to do that instead, please let me know.
## Validation Steps Performed
* Maximized/restored the Terminal on my display with the taskbar on the bottom
* Maximized/restored the Terminal on my display with the taskbar on the top
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