[macos] No buttons and title in header bar in fullscreen mode
Steps to reproduce
- on macOS, open gtk4-demo
- Open the inspector (Ctrl-i), select the GtkApplicationWindow and enable the
fullscreened
property - hover your mouse to the top of the screen
- The header bar shows, but no buttons and title are in there
Current behavior
There's no button to "unfullscreen" the window.
Expected outcome
macOS default buttons and title should show in the full screen header bar.
Version information
GTK 4.13.5
Additional information
This issue is most likely introduced by a6ce5067 / !6785 (merged), where we start to use FullSizeContent for CSD.
I think using this is still a good idea, but we should handle the full screen case properly.