- move expandable_property from AppliedRule to Rule property sheet
 - associate Rule (*not* AppliedRule) property sheet with Rule document
 - as Zope uses magic to fill automatically property_sheets list there is not need to repeat it in subclasses


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@28462 20353a03-c40f-0410-a6d1-a30d3c3de9de