
Since the last commit, ClutterStage automatically cancels an implicit grab (including all its ClutterActions) when a conflicting ClutterGrab appears. This means we no longer have to look out for GRAB_NOTIFY crossings in ClutterGestureAction and can instead depend on the sequence_cancelled() vfunc for this. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2342>