Message input box in the chat room needs fixing

[Kannaj]

The message box in the chat room currently is a textarea tag. It looks a bit ugly due to the rows attribute specified as a default.

We should try replacing it with a standard input box and include a button (probably called 'edit') which should open up an editor modal to type longer messages.

Alternative approach replace the message box with a <div contenteditable> tag which would allow the div to automatically increase on message overflow.