We should show 'select column' in any listbox mode if it's set (not just hide itforn gadget mode globally - i.e. if a form's listbox needs to hide / show this column it must be configured explicitly rather than hard coded globally).

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@37318 20353a03-c40f-0410-a6d1-a30d3c3de9de