Rework "subscribed" mailbox semantics
Right now, mailboxes have to be "subscribed" in order to be shown in
meli. That comes in opposition with the concept of server-side subscription in remote backends such as IMAP.
Questions to be resolved:
- Should configuration file subscriptions be ignored in favour of server side subscription? Should it be an error?
- How to communicate the existence of unsubscribed mailboxes to the user?
- Server side subscription can be set with commands. What is a better word to call config-file subscription to avoid this conflict in meanings?
Deleting a branch is permanent. It CANNOT be undone. Continue?