[mutter] (7 commits) Non-fast-forward update to branch wip/focus

[Giovanni Campagna <gcampagna src gnome org>]

The branch 'wip/focus' 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:

  8fe4870... display: Simplify checks to see if a window is the root win
  abb9b42... display: Return TRUE when we've handled an X event appropri
  0778ec8... display: Send input events to Clutter
  b310357... display: Don't grab the window actor's key focus
  2d44f95... display: Always use the key focused window for key events

Commits added to the branch:

  d858454... window-actor: Fix culling (*)
  ac0c7df... keybindings: fix invalid read after a keybinding is removed (*)
  115e260... display: Simplify checks to see if a window is the root win
  755400a... display: Return TRUE when we've handled an X event appropri
  d58dd16... display: Don't grab the window actor's key focus
  31bd122... display: Always use the key focused window for key events
  90ce30e... keybindings: fix per window keybindings

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