CPSNavigation
- add listing display option in the option layout (icon/detail..)
- getListing return equiv of getContentInfo instead of obj
- batching for navigation
   o use max_children for directory nav ?
- how to set some option from another tab like changing sort direction
  from the content list ?
- how to hide some options ?
- finish all sort option
- check tree filtering
- query must use portal types set in option
- handle root = root of all tree ?
- status line displaying current sort/filter link to option ?
- test keywords using "if kw.get('toto') is not None" instead of "if not
  kw.get('toto')"

# ------------------------------------------------------------
- CPSNavigation
   o rename into CPSTreeNavigation
   o need unit test
   o handle invalid current_uid
- FavoritesNavigation
   o expand all folder in Favorites as level 1
- LDAPDirectoryNavigation
   o unit test
   o more check
- ConfNavigation
   o rename into ConfigNavigation ?
- ZODBNavigation
   o check aq_base
- VocabularyNavigation
   o assuming that a key=path ?
