If you only can or want to use shortcuts to read
your IMAP mail you have a problem if you want to
jump automatically into the next (IMAP) folder
with unread mail. It does not work.

Expected Results:

With the shortcut (at the moment <AltGr>+<[>) it
should jump automatically to the next, subscribed
folder with unread mail.

How often does this happen? 

Every session, more times a day.

Additional Information:

Also important for accessibility.