[bug?] cannot change the content of thread_close_response

[Sasiko]

?config set thread_close_response
while the bot does respond with a success message, im unable to change the actual message content.
It will always remains

"You have closed this Modmail thread."

while i can change title and footer just fine.

[kyb3r]

Get someone to close the thread, if the same person closes the thread thread_self_close_response gets used. (This is intended)