Disable video widget and overlay controls on systems without X11 Change-Id: I0163fa83018b35ba6f0f8221ad3c465506b52d00 Reviewed-on: http://codereview.qt-project.org/4850 Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com> Reviewed-by: derick hawcroft <derick.hawcroft@nokia.com>