[gtk] (6 commits) Non-fast-forward update to branch x11-props

[Matthias Clasen <matthiasc src gnome org>]

The branch 'x11-props' 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:

  ef0c85e... Drop GdkToplevel:sticky
  dabbc67... tests: Stop using keep above/below
  b6c9a8e... window: Drop keep above/below
  5e8b877... Drop GdkToplevel:keep-above/below
  b3716bd... Drop focus-related properties
  a6e65d7... Drop GdkToplevel:accept-focus/:focus-on-map

Commits added to the branch:

  60ea971... Drop GdkToplevel:sticky
  103ef3c... tests: Stop using keep above/below
  6f156da... window: Drop keep above/below
  32b9dd6... Drop GdkToplevel:keep-above/below
  818ff5a... Drop focus-related properties
  cbd99df... Drop GdkToplevel:accept-focus/:focus-on-map