CoreCon: mark destructor as virtual

This was causing COM to not get uninitialized and resulted in
winrtrunner hanging.

Change-Id: Ie3e409a43f2cb41f28ef6975d81c68996554861f
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
qhelpgenerator: Fix warning about qpa_minimal_plugin usage

  Project WARNING: CONFIG+=qpa_minimal_plugin is deprecated. Use QTPLUGIN.platforms=qminimal instead.

Change-Id: I9f07c5033e0022e00c45e52570fe001856f13ca8
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
winrtrunner: Split AppxEngine into abstract base and Appx Local subclass

This allows common code to be reused in future Appx engine types.

Change-Id: I4e0ba09242eee6687604abe65d556a96a79346f4
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
Doc: Remove Qt Designer manual from the licensing group

The Qt licensing information page will link to the Qt Designer
-specific information directly.

Task-number: QTBUG-35362
Change-Id: I293402a8024f33b68446497a50b9782803d20761
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Merge remote-tracking branch 'origin/stable' into 5.3

Change-Id: Ided10fa5438cc1bd9a34fd8ded4bbd456abfe686