Fixed _currentBranchObjectGraph to be initialized with the same model description repository than the editing context
Fixed _currentBranchObjectGraph to be initialized with the same model description repository than the editing context

chris-armstrong/CoreObject,etoile/CoreObject,etoile/CoreObject,chris-armstrong/CoreObject,etoile/CoreObject,etoile/CoreObject,chris-armstrong/CoreObject,chris-armstrong/CoreObject