[mutter] (3 commits) Non-fast-forward update to branch wip/carlosg/wacom-tap-fix

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/wacom-tap-fix' 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:

  9c29a5f... backends: Add mapping function arg to settings_set_bool_set
  d3481c0... backends: Fix configuration changes to tap[-and-drag]

Commits added to the branch:

  8592a85... wayland: Handle NULL preedit text (*)
  18b661c... backends: Add mapping function arg to settings_set_bool_set
  ec1195e... backends: Fix configuration changes to tap[-and-drag]

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