853644d7fe
SwipeTracker connects to signals of the stage, but doesn't disconnect on destroy, leaving them hanging and potentially running callbacks for destroyed objects. This is visible when removing a folder by dragging all icons out, and running the swipe gestures, which will produce a bunch of warnings. Explicitly destroy, remove, and disconnect the swipe tracker. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1518>