Cross-platform titlebar (#9405)

This PR reverts https://github.com/zed-industries/zed/pull/9392 and
fixes the regressions that led to the reversion.

Release Notes:

- N/A

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Co-authored-by: Ezekiel Warren <ezekiel@seaube.com>
328aa2cc95Mikayla Maki committed on 3/15/2024, 5:40:58 PM· committed by GitHubparent44ac6ca
17 files changedLine totals unavailable