appmenu: Use existing menu in compact represenation
There's no need to reconstruct the entire menu, when it exists already. Also shows correct behavior on Wayland because the imported menues have correct parents compared to the new one. BUG:438467
There's no need to reconstruct the entire menu, when it exists already. Also shows correct behavior on Wayland because the imported menues have correct parents compared to the new one. BUG:438467