Next unread message extension wish

[Jacob Ilsų Christensen <firelake mail1 stofanet dk>]

Hi.

I was wondering if it was possible to extend (possibly via a config option
in the preferences) the Next Unread button so that it changes to the
next mailbox with unread messages, when there are none left in the mailbox
currently opened. That way you do not have to click each mailbox with
unread messages and then click Next Unread afterwards.

Best regards,
Jacob Ilsų.