Make menus close the same way as popovers
Currently menus seem to have different heuristics for closing than popovers, particularly for things like screenshots and the window losing focus (popovers stay intact, while menus are closed). Could we have them all behave like popovers? Among other things this would make it possible to screenshot menus and inspect menus with GtkInspector without workarounds, which is currently quite annoying.
Edited by Tobias Bernard