#Mail: Button to delete & next message
In the message menu, add a (drop-down) delete button that displays the next message in the list after deleting the opened message.
This could (and probably should) also be an option, so each user can choose which behavior they prefer, i.e. "After deleting/moving a message...Show next message / Show previous message / Return to inbox (or Don't show any message)"
I would like to stress, though, that there really must be the option to have it behave as it currently does, which is to not open another message after deleting/moving the current one. The lack of such an option, and the refusal to add one, is the main reason I'm looking to leave FastMail.
See also https://github.com/runbox/runbox7/issues/708.