Bugfixes since 42.2 (all backports from master pending upcoming 43 release)
(Logan Rathbone):
- main: Hotfix to workaround gtk #4880 (affects Save As dialogs on X11
primarily)
- config: Add GNOME 42+ compatibility for dark mode, and fetch dark settings
from portal if possible
- widget: Properly update highlights upon resize
- find-replace: Remove spurious g_object_ref() call
