Merge remote-tracking branch 'remotes/kraxel/tags/pull-gtk-5' into staging

gtk: Implement grab-on-click behavior in relative mode

# gpg: Signature made Tue 08 Apr 2014 12:58:49 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-5:
  gtk: Implement grab-on-click behavior in relative mode

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