Set locked state while locking for grab.

Change-Id: If4b8fa77e6e3a288487a011e83791ad6a189675c
Reviewed-by: Manish Sharma <83.manish@gmail.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Update QtQuick import value to 2.3

The current documentation uses import QtQuick 2.2 which is wrong since
there are new APIs like mipmap for the QML Image element.

Task-number: QTBUG-39302
Change-Id: I3cc3a1522efd85090c3b4011429fa16b95e79435
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Merge remote-tracking branch 'origin/stable' into 5.3

Change-Id: Iafccb173a9b5569bc9fd1022abb210955519fc61