- Disable the IMAP test button as it doesn't work yet
- Remove word 'successfully' when testing SMTP as we're only adding the message to the queue, it wasn't sent yet
- Split into admin and user handlers, each admin page gets its own file now
- Enforce role access once for admin POST requests
- Automatically load POST logic for admin-based requests based on the referring page, otherwise automatically load all user request logic
- Add support for using custom POST handlers