* Use relation string fields to jump to the target easily.
* For some categories, titles is often more usefull than relative urls. It is still possible to see the relative_url in the list of categories.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27368 20353a03-c40f-0410-a6d1-a30d3c3de9de