8f4427f87b
ClutterEffects are responsible for queueing redraws when their properties change (and StScrollViewFade is a good citizen already), also Clutter itself should queue a redraw when adding/removing an effect. Users of Clutter should never have to queue redraws themselves (unless they're implementing a custom ClutterEffect or ClutterContent), so don't queue a redraw here. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2189>