Option to switch to other session when current closes instead of detaching

[lizclipse]

When I quit/close a session, I pretty much always want to switch to a different session instead of detaching entirely, meaning if I close the current session without thinking too hard I then have to re-attach.

An option like detach_on_session_close (defaulting to true to keep current behaviour) would be very much appreciated. Doing it this way instead of altering the keybinds lets the Quit action behave similarly to closing every pane in a session, which is what I'd want (personally)