K-9 Mail v6.311

What's Changed

• Don't unexpectedly show and focus the "reply to" field when composing a message (@cketti)
• Fixed a bug where sometimes toolbar buttons in the message view would affect another message than the one currently being displayed (@cketti)
• Changed the way the app switches to the next/previous message to avoid a bug that could lead to the toolbar disappearing (@cketti)
• Fall back to using IPv4 if connecting to a POP3 server using IPv6 fails (@cketti)
• SMTP: Stop treating all TLS errors as certificate error (@cketti)
• Added more (local) logging when creating and removing notifications (@cketti)
• Fixed a couple of rare crashes (@cketti)

Full Changelog: 6.310...6.311