QtIFW

Fixes QTIFW-36.

Select all/ deselect all button should be disabled.

Change-Id: I3b7db648736369cc139be97b7fbd8c61ad187220
Reviewed-on: http://codereview.qt-project.org/4481
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Tim Jenssen <tim.jenssen@nokia.com>
Reviewed-by: Karsten Heimrich <karsten.heimrich@nokia.com>