Add html style preference.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@6897 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/Document/Preference.py

@@ -55,6 +55,7 @@ class Preference( Folder ):
                     , PropertySheet.Preference
                     , PropertySheet.AccountingPreference
                     , PropertySheet.SubversionPreference
+                    , PropertySheet.HtmlStylePreference
                     )
   
   # Declarative security