f5d793647b
Switching between the app grid and the window picker in the overview via gestures results in _gestureEnd() getting called with endProgress !== 0 in both cases, which leads to it calling _showDone(). This then unconditionally changes the state to SHOWN, which in this situation is already the current state. Since the previous commit this results in a warning, so check if we are already in the SHOWN state. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2514>