[mutter] (48 commits) Non-fast-forward update to branch wip/laney/systemd-user

[Iain Lane <iainl src gnome org>]

The branch 'wip/laney/systemd-user' 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:

  0e60837... meta-launcher: Find the current user's graphical session, n

Commits added to the branch:

  cbc7831... tests: run mutter-test tools with G_TEST_* env variables (*)
  859bea6... tests: use abs_srcdir to refer to metatest files (*)
  04e411c... compositor: Remove dead code: META_DISABLE_MIPMAPS (*)
  6621a9b... tests: Add missing monitors config XML file (*)
  15fa781... configure.ac: Bump libmutter API version to 3 (*)
  3d2b9a3... Add MetaX11Display skeleton (*)
  522f9b4... display: Emit signals when opening and closing X11 display (*)
  1877910... Start populating MetaX11Display (*)
  dacc041... Switch meta_error_trap functions to MetaX11Display (*)
  c64d5ad... Move X11 extension queries to MetaX11Display (*)
  cd8f425... Move screen size and cursor setting to MetaDisplay (*)
  937a985... Unmanage compositor and windows when closing display (*)
  722c975... Move alarm and xids management to MetaX11Display (*)
  9e5ea8d... Move groups and window/group prop hooks to MetaX11Display (*)
  98d912b... Move stack tracking and guard_window outside of MetaScreen (*)
  0589959... Move X11 helper windows and xprops to MetaX11Display (*)
  1530f27... Move X11 event, icon cache and property handling to MetaX11 (*)
  68f261e... Move rest of non-X11 specific objects from MetaScreen (*)
  e1c67a1... Move monitor management API to MetaDisplay (*)
  82307dd... Move xinerama management to MetaX11Display (*)
  6458139... Move mouse window tracking to MetaDisplay (*)
  d79ffd3... Move UI and key grabs to MetaX11Display (*)
  b7c3dad... Move workspace handling to MetaDisplay and MetaX11Display (*)
  1d5e370... Stop using MetaScreen where it is unnecessary (*)
  0a8ae84... Get rid of MetaScreen (*)
  8e7e1ee... Prepare for making MetaX11Display conditional (*)
  14d8aec... prefs: Allow no-op listener removal (*)
  8adab02... Make workspace management work without X11 (*)
  9333a6d... Make bell and libstartup-notification bits work without X11 (*)
  9f1ab1c... Move workarea hint setting to MetaX11Display (*)
  e6b8852... Make stack tracker work without X11 (*)
  de5e7a7... Don't use gtk_settings callback to set shell_shows_app_menu (*)
  89727aa... xwayland: Destroy selection bridge windows before closing X (*)
  d4c4d6e... Split GDK initialization from MetaUI (*)
  43f9cd5... Fix XDND handling to work without GDK and MetaX11Display (*)
  e8171cc... Use MetaMonitorManager insted of MetaDisplay where possible (*)
  d5c5669... Add --no-x11 flag so mutter wayland can be started without  (*)
  2ac7afe... remote-desktop: Remove unnecessary include (*)
  390314a... Rename errors.[ch] to meta-x11-errors.[ch] (*)
  e05cd60... Add MetaWorkspaceManager skeleton (*)
  81c1c70... Move workspace related code from MetaDisplay to MetaWorkspa (*)
  e246466... x11-display: Set the correct default Xcursor theme size (*)
  1caaf0c... display: Export meta_display_close() (*)
  f635876... x11: Open window decoration X11 connection earlier (*)
  5b8c8a4... display: Remove replaced signals (*)
  0ca3526... display: Make meta_display_get_workspace_manager() introspe (*)
  3fbeeb9... backends/x11: Force-update cursor when theme or size change (*)
  4837ea3... meta-launcher: Find the current user's graphical session, n

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