- added missing Reference property sheet

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@22516 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/SupplyLink.py

@@ -70,6 +70,7 @@ class SupplyLink(Path, XMLObject):
                       , PropertySheet.TransformedResource
                       , PropertySheet.Delivery
                       , PropertySheet.Simulation
+                      , PropertySheet.Reference
                       )
 
     security.declareProtected(Permissions.AccessContentsInformation,