Modified setCriterion so that _identity_criterion and _range_criterion are not set if the form fields weren't set (instead of adding [] or '' to these properties).
Added an edit function that checks criterion_property_list and cleans _identity_criterion and _range_criterion from unused values.

This allows the test method to work correctly.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@1905 20353a03-c40f-0410-a6d1-a30d3c3de9de