Switch from using the key window to the main window mac platform API

When the help menu is open, the help menu's search field is the key window, and this was causing menu item action resolution to fail

co-authored-by: Max <max@zed.dev>
adf94a1681Mikayla Maki committed on 3/10/2023, 10:43:28 PMparent9398de6
6 files changedLine totals unavailable