#2929: progress bar when opening mailboxes doesn't show percentage any more
The new progress bar API doesn't support a percentage count for mailboxes. The problem is that the ticker is in units of messages, but the size is in bytes (the total number of messages is unknown until the mailbox is opened). We probably need to add an extra field into progress update to pass the current offset of the mailbox so that we can calculate percentage properly. -- Ticket URL: <http://dev.mutt.org/trac/ticket/2929>
