GTK4 support
(This is a suggestion for xfce4.18)
-Posted this before but I accidentally made it only visible to team members with permissions-
With the upcoming release of gnome 40 many apps and themes will be ported to gtk4 and will have a lot of new features. It would be great to have all those new features supported in xfce allowing devs to use newer software to create apps and themes designed for xfce and create a more modern desktop environment