When managing multiple accounts it's hard to determine which one you're
currently viewing. This patch makes sidebar look like this:
+++++++++++++++++++++++++
luke@lukesmith +
----------------------- +
INBOX 99+
Sent Mail +
Drafts +
Trash +
Spam +
+++++++++++++++++++++++++
The only problem with it is the necessity of changing sidebar_format, as with
its current value these 2 excess mailboxes are being appended with 0. That
leads to situation when size of an empty mailbox is being displayed as empty
string instead of 0. I consider it's not a big deal.
On account change new account's mailboxes are being appended to the old
one's. This commit forces mailboxes list to be cleared before adding new
items to it.
Andrey Drobyshev