Added aggregate relation

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@9219 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/PropertySheet/WebSite.py

@@ -27,7 +27,7 @@
 
 class WebSite:
     """
-        PropertySheetTemplate properties for all ERP5 objects
+        WebSite properties for all ERP5 objects
     """
 
     _properties = (
@@ -49,3 +49,5 @@ class WebSite:
             'mode'        : '' },
     )
 
+    _categories = ('aggregate', )
+