Update configs to allow for return to main/exit and repeat menu

Adds configuration information necessary for adding the following DTMF buttons:

'*' - repeats the last menu.
'#' - exits from the change folders prompt. If already in the main menu, plays bye and hangs up.
The code that handles converting DTMF input to FSM actions expects either a key/value pair where the key is the DTMF and the value is the action to take or a structure with a regex and an action, not sure how it will handle both at the same time.