How to specify special-use mailboxes in KMail

Hi!

I have setup a Dovecot IMAP-Server, and I want to store special use mailboxes 
(such as Sent or Drafts) on that server. I'm using KMail. How can I specify 
the folders which should be used by the client, for special-use messages, such 
as sent messages?

It seems that those folders can not be specified in KMail 5.1.3. I only found a 
setting for the Trash mailbox in KMail's configuration. Maybe this feature has 
been added to the recent version of KMail?

This is from RFC 6154, "IMAP LIST Extension for Special-Use Mailboxes":

   Some IMAP message stores include special-use mailboxes, such as those
   used to hold draft messages or sent messages.  Many mail clients
   allow users to specify where draft or sent messages should be put, ...
   
Bye
Volker