Remove the Up-Arrow's effect in the web-based Chat window

In the CMD tab, the Up arrow is great so that we can cycle between previous commands. I **never** need that in Chat. Ever. If I'm typing instructions or an explanation to a client and want to go back to a previous sentence and hit the Up key, I lose everything and get what I typed last. There goes the lengthy paragraph about how not to re-break their email again and back to "Hi, Bob." I waste a lot of time re-typing things.

Please turn this off.