Clarify use of admin/responses routes
Clarify use of admin/responses routes

The responses controller only works when a consultation_id exists in
the route. The admin/responses block is only used for attachments and
should never be used directly.

YOTOV-LIMITED/whitehall,alphagov/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,alphagov/whitehall,askl56/whitehall,hotvulcan/whitehall,askl56/whitehall,robinwhittleton/whitehall,ggoral/whitehall,robinwhittleton/whitehall,askl56/whitehall,alphagov/whitehall,askl56/whitehall,robinwhittleton/whitehall,robinwhittleton/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,hotvulcan/whitehall,YOTOV-LIMITED/whitehall,alphagov/whitehall,hotvulcan/whitehall,hotvulcan/whitehall,ggoral/whitehall