wayland: Fix handling of unminimization for not fully initialized xdg-toplevels
If setMinimized(false) is called for a not fully initialized XdgToplevelWindow, we don't want to emit the windowShown signal.
(cherry picked from commit c59f3859)
If setMinimized(false) is called for a not fully initialized XdgToplevelWindow, we don't want to emit the windowShown signal.
(cherry picked from commit c59f3859)