There is no "Keep Alive" setting for FTP-connections. This causes crashes and loss of information if a file is opened in a text-editor and you try to save it back to the server.
It is almost standard in FTP-clients (eg FileZilla / WinSCP) that connections are kept alive to prevent this. So this is more a reminder to implement something that is needed than a new idea ;-)
I noticed - at least on my hosted server - that a FTP connection over SSH stays alive much longer.
Still want the "Keep Alive" function implemented, because I still loose files that I am working on when the connection is lost and that is a real problem.