[mutter] (14 commits) Non-fast-forward update to branch wip/carlosg/x11less-preparations

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/x11less-preparations' 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:

  3f7b8dc... core: Turn MetaStack into a GObject
  811e30e... x11: Add MetaX11Stack object
  65d20d3... core: Avoid grab transfer shenanigans with non-X11 backend
  e396687... core: Separate checks for pointer barriers availability
  7d9b203... x11: Move X11 calls to map/unmap a MetaWindow to MetaWindow
  83487b5... core: Relax requirement that MetaWindow shall have icon/min
  a130218... x11: Separate X11 focus handling into MetaX11Display method
  9caa2da... core: Untangle input focus management
  50afc9c... core: Add explicit init/shutdown_x11() MetaDisplay calls
  72f928f... x11: Unmanage X11 windows on MetaX11Display finalization
  e656157... x11: Initialize GdkDisplay together with MetaX11Display
  ec77c57... wayland: Split Xwayland initialization in 2 steps
  e8fb93a... compositor: Drop error trap
  eb67536... wayland: Drop error trap

Commits added to the branch:

  4cdcea9... core: Turn MetaStack into a GObject
  cdaff7f... x11: Add MetaX11Stack object
  4711088... core: Avoid grab transfer shenanigans with non-X11 backend
  010c680... core: Separate checks for pointer barriers availability
  b8e32a5... x11: Move X11 calls to map/unmap a MetaWindow to MetaWindow
  d82975d... core: Relax requirement that MetaWindow shall have icon/min
  f2094ab... x11: Separate X11 focus handling into MetaX11Display method
  4f7790c... core: Untangle input focus management
  59c9248... core: Add explicit init/shutdown_x11() MetaDisplay calls
  6bf9af1... x11: Unmanage X11 windows on MetaX11Display finalization
  1452695... x11: Initialize GdkDisplay together with MetaX11Display
  afbfc5a... wayland: Split Xwayland initialization in 2 steps
  fa2958f... compositor: Drop error trap
  4bbabd8... wayland: Drop error trap