Stretch / resizable message area?

[jlaborde]

I would like the message area used for new replies, post edits, etc to either stretch with the browser or be a resizable textarea like the template editor's textarea.

At first I tried the obvious of setting 'Message Area Width' to a percentile and editing out the 'px' suffix in the editor_toolbar_on template, but that actually shrunk the area! I figured it had to be tied to a div, table, etc, but even adding "width=100%" to all areas I thought could be at play here, it did no good.

So then I moved on to a resizable textarea with the little resizable corner in the bottom right (no, the resize buttons are not sufficent). I compared the source of the textarea item from the control panel to the textarea in the template, matched them up, and... nothing.

Anyone know how to make one / both of these modifications? My 'search-fu' has not returned any results thus far.