* chat: simplify input handling
Removes the cursor save/restore functionality.
Removes most key handling.
Allows message to go over limit.
Moves the message length check into SendMessage.
Changes the chat input to change to the max style only when over the limit,
rather than at the limit. Makes it apparent that something is wrong.
Fixes#3121
* Prettified Code!
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Co-authored-by: jprjr <jprjr@users.noreply.github.com>
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