Calling requestActivate() on native child widgets
can cause focus problems (keyboard input going to
widgets that don't handle it,etc).

Breakage introduced by:
4675681b5e88b178adbdef775ac6a4b1e573458 .

Task-number: QTBUG-30922

Change-Id: I4efdfef6bffc89fe62156d248f05ed99c58bf794
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>