Merge remote-tracking branch 'remotes/kraxel/tags/pull-gtk-4' into staging

gtk: pointer fixes from Takashi Iwai.

# gpg: Signature made Mon 07 Apr 2014 09:51:52 BST using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-gtk-4:
  ui: Update MAINTAINERS entry.
  gtk: Remember the last grabbed pointer position
  gtk: Fix the relative pointer tracking mode
  gtk: Use gtk generic event signal instead of motion-notify-event

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>