Add CategoryCore into ActiveProcess, otherwise updateRelatedContent does not work.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@30344 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFActivity/ActiveProcess.py

@@ -79,6 +79,7 @@ class ActiveProcess(Base):
   property_sheets = ( PropertySheet.Base
                     , PropertySheet.SimpleItem
                     , PropertySheet.Folder
+                    , PropertySheet.CategoryCore
                     , PropertySheet.ActiveProcess )
 
   # Declarative constructors