Avoid bogus accessibility focus events from menus.

Avoid bogus accessibility focus events from menus.

Do not send accessibility focus events when menus are involved.
There are focus events to preserve the old focus when showing a new popup window.

Reviewed-by: Jan-Arve
(cherry picked from commit 32079bb0b348ef5f7126e69be9bcfb249c1a6412)

Change-Id: Id4838a3aede1d60a1850385e97660d085f055d64
Reviewed-on: http://codereview.qt.nokia.com/3021
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@nokia.com>