
This adds some plumbing to get the "default" paint flags for regular stage painting, where one either wants to paint the overlay, or not. If inhibited, the 'no-cursors' paint flag is used, otherwise the 'none' flag. This will be used to allow having a per stage view hw cursor state. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2777>