462d504ca0
Wayland popup grabs, unlike other grab types, can be safely cancelled so there's no reason to deny compositor grab requests if a wayland popup is on. In particular, this allows entering the overview via a keybinding or locking the screen while a wayland popup has a grab which is something that's been advertised as a wayland improvement over X. https://bugzilla.gnome.org/show_bug.cgi?id=771235