With Selenium 0.8 or later, isEditable() raises an error if the specified element isn't an input element. So we can't use assertNotEditable or verifyNotEditable for asserting "it isn't an input field".

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25448 20353a03-c40f-0410-a6d1-a30d3c3de9de