QmlDesigner: Ugly hack for the Window bug

Window is not working so we exchange it with an item. We need a better
approach for it in the next release. Revert this patch in master.

Hotfix: 3.1

Task-number: QTCREATORBUG-11601
Change-Id: I047dd558f8813cc8b3b6c8bad3394c3cf30c8d8e
Signed-off-by: Marco Bubke <marco.bubke@digia.com>
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner: Bump version of qml2puppet for Qt Creator 3.1

Change-Id: I57aae18fec28f01425cc13285504f57aef3afd25
Reviewed-by: Marco Bubke <marco.bubke@digia.com>