Mac style: Fix selected tab text color on 10.6

This is a regression introduced by a1eaf0169f041f599895fac90570df601559a526.

Task-number: QTBUG-34540
Change-Id: I3944a92f5119e0ec7c435b5b36ed4bc3d7361888
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>
CoreWLan: Fix potential unhandled exception assert

-[QNSListener notificationHandler:] was declared as not taking any parameter,
but used as taking a single NSNotification. This would lead to an 'unrecognized
selector' exception raised by Cocoa.

Task-number: QTBUG-26844
Change-Id: I723b4c89b0faf1fe156a3c96cb1dd3abfad8daa6
Reviewed-by: Liang Qi <liang.qi@digia.com>
Update 4.8.6 changelog

Change-Id: Ie5f65d9f8915d327aed03a1d7073782fb2c6fdbc
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>