linux: Indicate when the window is focused (#14266)

fixes #14202

Release Notes:

- Added a representation of the current focus state to Zed's window
style ([#14202](https://github.com/zed-industries/zed/issues/14202))
fe3fe945a9Mikayla Maki committed on 7/12/2024, 9:20:58 PM· committed by GitHubparent11178ea
15 files changedLine totals unavailable