QmlDesigner.ItemLibrary: remove declarative private dependecy
We derived from QDeclarativeListModel which is private. This patch uses QAbstractListModel instead. Change-Id: Ib567433f5fbb38780b32e5a9291d2cb87730e624 Reviewed-by:Kai Koehne <kai.koehne@digia.com> Reviewed-by:
Marco Bubke <marco.bubke@digia.com>