[mutter] (3 commits) Non-fast-forward update to branch bilelmoussaoui/untangle-window

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

The branch 'bilelmoussaoui/untangle-window' 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:

  3e44735... core: Untangle meta_window_shared_new
  e75be78... window: Move surface property to it subclasses

Commits added to the branch:

  e42c9b9... Update German translation (*)
  1a558db... core: Untangle meta_window_shared_new
  abfd8a5... window: Move surface property to it subclasses

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