[mutter] (2 commits) Non-fast-forward update to branch cherry-pick-c93e402a

[Robert Mader <rmader src gnome org>]

The branch 'cherry-pick-c93e402a' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  54ab436... monitor-manager: Ensure monitors settings after backend has

Commits added to the branch:

  a7e1e2a... display: Unmanage windows before compositor (*)
  0f06a7d... monitor-manager: Ensure monitors settings after backend has

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