[Dovecot] virtual mailboxes folder structure

Hi, I am trying to find a way to list my virtual mailboxes hiding the namespace prefix into my imap client.

Fore example now my “All” mailbox is listed under virtual/ as:

Inbox Sent Drafts Spam Trash
virtual
All

I would like to list as this:

Inbox Sent Drafts Spam Trash
All

This is my 10-mail.conf: http://pastebin.com/DumEbbmy and this is my 15-mailboxes.conf: http://pastebin.com/QFzWGzyC

I thought that the list = children paramenter would do but it did not.

Thank you