[Azoth] Slight code refactoring.
[Azoth] Refactored finished handling.
[Azoth] Auto-opening incoming files now optional.
[Azoth] Code style fix.
[Azoth] Send an AN entity on file completion.
[Azoth] Keep & use transfer save paths.
[Azoth] Better `incoming file` text without comments.
[Azoth] User strings should be translatable.
[Azoth] Support external opening for incoming files.