Fix resizability of the comment dialog on master.
Review Request #6981 — Created Feb. 26, 2015 and submitted
When I updated jQuery (and as part of that removed hacks for old versions of
IE), I inadvertantly removed the $.resizable() call for the comment dialog.
This change reinstates it.
Added draft comments for diffs and file attachments, and saw that I could both
drag and resize the comment dialog.