updated "message-sent" response, to avoid referencing actual channel
updated "message-sent" response, to avoid referencing actual channel

smn/heatherr,praekeltfoundation/heatherr,praekeltfoundation/heatherr,praekelt/bellman,smn/heatherr,smn/heatherr,praekeltfoundation/heatherr,smn/heatherr,praekeltfoundation/heatherr