Share QtQuickControlsTestApp used by auto tests also for manual tests

Change-Id: I5853c6c4c315aebdc378af1f3c0e6d34a2b19115
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Reviewed-by: Caroline Chao <caroline.chao@theqtcompany.com>
Workshop manual test (the former Gallery example)

Change-Id: Ib62be83b1652777e7603a262a8a89c132d3766e7
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Reviewed-by: Caroline Chao <caroline.chao@theqtcompany.com>