[imp] Making appearance of folders content dependent

[Administrator BCS]

Request from our users: When the inbox contains one or more unread  
messages, Horde shows this by displaying "Inbox" in bold, with the  
number of unread messages behind it. Is there a way to make other  
(user-created) mail folders behave in the same way?

Reason: When using filters to automatically move incoming messages to  
certain folders, it is not possible to see which folders  
received/contain new unread messages.

Using Horde 5.16/Dovecot/Maildir