Hide the items which are part of delegates.

Change-Id: I3c27210fd2bf8618c69e861d952a14c6f7e3be6a
Reviewed-on: http://codereview.qt.nokia.com/1442


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Marco Bubke <marco.bubke@nokia.com>