Does it shut the previous chat off that is recent enough to be in the chat box?
Aha. I looked at the code. It kills all current, previous, and new chat. But that chat history comes back after you push the key bind again. It's the same as going to options and changing the max chat lines to 0, and then changing it back again. Except this has a key bind that does it.
Also, I didn't make the keybind code.