When I delete a message from my K9 Mail app, it creates a label in my webmail account named "[imap]/trash". It also places a copy of the mesasge in the normal TRASH folder. I delete the [imap]/trash folder from my webmail account, but K9 re-creates it whenever I delete a message from the phone. How can I stop K9 from doing this, and only placing a copy in the normal TRASH folder?