feat: close maximized panels with escape key

[dsmmcken]

fixes: #1165

Was annoyed with this while working on something, add handling to escape close maximize fields.

Exclude if inputs are focused (ex. monaco uses escape to deselect, but doesn't consume it, native searches clear field but don't consume it either).

[Copilot]

Pull Request Overview

This PR adds the ability to close maximized panels by pressing the Escape key, addressing issue #1165. The feature intelligently excludes input elements to avoid conflicting with their built-in Escape key behaviors.

• Added escape key handling to close maximized panels
• Implemented input element detection to prevent conflicts with existing escape behaviors
• Added proper event binding and cleanup for the keydown handler

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[codecov]

Codecov Report

❌ Patch coverage is 13.33333% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 44.56%. Comparing base (d1b557f) to head (ff07505).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/golden-layout/src/LayoutManager.ts	0.00%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2533      +/-   ##
==========================================
- Coverage   44.57%   44.56%   -0.02%     
==========================================
  Files         764      764              
  Lines       42807    42821      +14     
  Branches    10765    10773       +8     
==========================================
+ Hits        19083    19084       +1     
- Misses      23713    23726      +13     
  Partials       11       11              

Flag	Coverage Δ
unit	44.56% <13.33%> (-0.02%)	⬇️

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[mattrunyon]

This breaks clearing selection on a grid while maximized. We seem to not stop propagation of the escape key event on grid so that you can close linker

One potential fix would be to stop propagation on grid escape in SelectionKeyHandler and change linker close to use capture phase. I think that should work

[mattrunyon]

Actually looks like linker already uses capture phase, so might just be able to consume the event in Grid? Although then it will always eat it because it still handles clearing nothing

[dsmmcken]

Changed to only stop propagation when clearing.

If grid has selection and focus, and grid is maximized, and linker is open:

1st escape clears grid
2nd escape clears linker
3rd escape minimizes