Add support for Adw.AlertDialog
Test plan
# Unknown
python3 -m unittest
# GNOME 45 (no AdwAlertDialog)
flatpak run --command="python" --socket=wayland --filesystem=$PWD org.gnome.Platform//45 -m unittest
# GNOME 46 (yes AdwAlertDialog)
flatpak run --command="python" --socket=wayland --filesystem=$PWD org.gnome.Platform//master -m unittest
Screenshot for
Edited by Sonny Piers