[mutter] (11 commits) ...clutter: Remove "source" event union fields

[Marge Bot <marge-bot src gnome org>]

Summary of changes:

  fd0e7ed... clutter: Move away from clutter_event_get_source() in Clutt (*)
  52002d0... core: Move away from clutter_event_get_source() (*)
  9b6253b... wayland: Move away from clutter_event_get_source() (*)
  5dd818c... tests: Move away from clutter_event_get_source() (*)
  64671e4... clutter: Drop unpaired special handling of LEAVE event on s (*)
  a7f85c8... cally: Get key focus from stage instead of event (*)
  6182cee... clutter: Peek target actor directly when managing events (*)
  b644ea1... clutter: Do not set ClutterEvent source actor anymore (*)
  62bd035... clutter: Add clutter_stage_get_event_actor() API call (*)
  2aeaeec... clutter: Rewrite clutter_event_[gs]et_source() (*)
  e736b04... clutter: Remove "source" event union fields (*)

(*) This commit already existed in another branch; no separate mail sent