de8876bd5e
If a user is in the middle of a drag in the window list and the
window list associated with the drag gets destroyed, the drag
monitor gets leaked.
Later when the drag motion is processed, spew goes to the log:
clutter_actor_contains: assertion 'CLUTTER_IS_ACTOR (self)' failed
Examples of triggers for this bug:
- The monitor topology changes
- The screen gets locked during the drag
This commit fixes the spew and the leak by ensuring any pending
drag monitoring is disabled when the window lists are destroyed.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/145>
(cherry picked from commit 8318ea919f)