many css selector were used in listbox. Now there is 3 principals :
- class="listbox" for standard lisboxes (the selector to use is for exmample : table.listbox { background: green})
- class="listbox table" for table style (the selector to use is for exmample : table.listbox.table { background: red;})
- class="listbox search" for search style (the selector to use is for exmample : table.listbox.search { background: blue;})

remove tbody, thead and tfoot markup. Because this generate not xhtml valid code when there is nothing in the body. And body markup is mandatory if we want to display the
ad and tfoot. Now all this markup are replaced by <tr class="tbody"> <tr>

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26259 20353a03-c40f-0410-a6d1-a30d3c3de9de