List setter without 'List' suffix should not split strings

Before, setFoo was equal to setFooList and
  setFoo('ab cd') equivalent to setFooList(('ab', 'cd'))

With this commit, setFoo('ab cd') == setFooList(('ab cd',))

This fixes changing permission on RoleInformation_view form.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@29646 20353a03-c40f-0410-a6d1-a30d3c3de9de