[mutter] (17 commits) Non-fast-forward update to branch wip/carlosg/unassorted-perf-fixes

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

The branch 'wip/carlosg/unassorted-perf-fixes' 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:

  582a880... clutter: Avoid rounding compensation when invalidating 2D a
  8ef0db1... compositor: Avoid changing pipeline/source if shadow is not
  0aaf7df... cogl: Ensure to only clear the depth buffer if depth testin
  89ef972... Revert "Revert "ClutterActor: Optimize away idempotent scal

Commits added to the branch:

  1f3e917... clutter/x11: detect tablet type from the Wacom property (*)
  fe0a394... build: check for cvt only when building the native backend (*)
  ae4d3bc... clutter: Remove ability to externally set sync-to-vblank (*)
  7d20101... cogl-framebuffer: Remove swap_throttled config (*)
  df284f9... clutter: Rename SYNC_TO_VBLANK to SWAP_THROTTLE (*)
  2b938ce... clutter: minor documentation update (*)
  df48b94... clutter: Add API to retrieve the physical size of absolute  (*)
  08a5e66... backends: Add MetaInputMapper (*)
  87858a4... backends: Delegate on MetaInputMapper for unmapped display  (*)
  faf89ff... backends: Add MetaInputMapper method to lookup devices from (*)
  d30301c... backends: Turn builtin touchscreen on/off together with DPM (*)
  ffca9b9... backends: Update to new "output" setting for tablets/touchs (*)
  7a98055... build: Depend on gsettings-desktop-schemas >= 3.31.0 (*)
  08758bd... clutter: Avoid rounding compensation when invalidating 2D a
  b4fa671... compositor: Avoid changing pipeline/source if shadow is not
  e1d27d5... cogl: Ensure to only clear the depth buffer if depth testin
  1a407d0... Revert "Revert "ClutterActor: Optimize away idempotent scal

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