[mutter] (13 commits) Non-fast-forward update to branch wip/up-client-cleanups

[Bastien Nocera <hadess src gnome org>]

The branch 'wip/up-client-cleanups' 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:

  2736727... monitor-manager: Don't throw an error if UPower isn't runni
  4be8f71... monitor-manager: Don't black out the screen for 10 sec when

Commits added to the branch:

  7945ee5... backends: Remove X11 idle-monitor backend (*)
  84e575b... x11: Allow XTest and core events to reset idletime (*)
  4af00ae... idle-monitor: Take idle inhibition into account (*)
  657417a... backend: Reset idle when lid is opened or resuming from sus (*)
  01a0fa9... idle-monitor: Add ResetIdletime API, for testing purposes (*)
  f6cd877... native: Disable the use of KMS modifiers by default (*)
  7fdac6d... monitor-manager-kms: Use g_autoptr for error (*)
  773b838... monitor-manager-kms: Don't add GPU if it fails (*)
  bc05e49... gpu-kms: Return NULL, not FALSE (*)
  afecfa6... backends/native: Remove unused upower-glib header
  3ec1e73... monitor-manager: Don't throw an error if UPower isn't runni
  3862373... monitor-manager: Don't black out the screen for 10 sec when
  901b229... backend: Move lid-is-closed handling to MetaBackend

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