Suggestion for ATS/BTS html

I've noted that as ATS has grown, so have the "thread counts".

This "thread count" or "post count" is part of the URL that shows up in the "reply to" text message box and it is making the text area do a "side scroll" of at least one column.

The current html reads:

rows="15" cols="72"

It appears that changing the html to:

rows="15" cols="7]3"

...makes the side scroll go away.

One would think that making it:

rows="15" cols="75"

...would anticipate future growth of ATS?