mailbox list feature request

[matteo <mettius email it>]

hi! i'm new to this list and i hope i'm not asking things that are 
already been asked.
i'm using balsa2 as my main mail client, it works great.
my balsa window consists of only threads-list. i don't use preview pane 
or mailboxes list.
so switching mailboxes is a little boring. for example eudora has a 
pull-down menu in which i can choose between mailboxes, and i can 
choose between tabbed pages or multiple windows.

thanks
matteo