[svn r1608] Correct the keywords bugs and some other in folder view, plus mutual
exclusion of selected keywords in dynamic view.
* Selection based bookmarks editions.
* Used SQL sequence instead of the db_sequence table.
* Add CSS.
* Add Search capabilities.
* Add default (dynamic?) tree expansion using colltags.
* Add XBel Export.
* Add support for icons.
* Add modified time.
* Add access/check time.
* Add user session support.
* Better unicode handling.
* More user preferences.
* Clean up of all the code. This is a real mess currently!
* Optimization of some code part.