At last something that works pretty well under firefox and with multiple selection possible (using Mootools HtmlTable.Select). There are some problems with IE and Chrome (the position: relative on td elements is not well supported).
Mootools update (1.3)
close#109
Checking limit when creating/updating a mailbox.
I think the refactoring is over :-) I need to add specifec events that will allow plugins to define their own roles inside the hierarchy.
Otherwise, the graphical part needs some improvment, actually it's not really pretty :p