Make GTK4 port work on elementary
See https://github.com/elementary/browser/discussions/82
Depends on:
- https://github.com/elementary/granite/pull/632
- libadwaita!768 (merged)
- vala@6aaecb3b
- An SDK update with the latter 2 (the vala commit is already in main, but not in the sdk)
Edited by Alice Mikhaylenko