Fix resizability of the comment dialog on master.
Fix resizability of the comment dialog on master.

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.

Testing done:
Added draft comments for diffs and file attachments, and saw that I could both
drag and resize the comment dialog.

Reviewed at https://reviews.reviewboard.org/r/6981/

brennie/reviewboard,chipx86/reviewboard,bkochendorfer/reviewboard,reviewboard/reviewboard,KnowNo/reviewboard,reviewboard/reviewboard,brennie/reviewboard,chipx86/reviewboard,chipx86/reviewboard,brennie/reviewboard,beol/reviewboard,davidt/reviewboard,davidt/reviewboard,sgallagher/reviewboard,custode/reviewboard,bkochendorfer/reviewboard,beol/reviewboard,custode/reviewboard,reviewboard/reviewboard,sgallagher/reviewboard,KnowNo/reviewboard,sgallagher/reviewboard,sgallagher/reviewboard,KnowNo/reviewboard,davidt/reviewboard,davidt/reviewboard,custode/reviewboard,bkochendorfer/reviewboard,bkochendorfer/reviewboard,beol/reviewboard,KnowNo/reviewboard,brennie/reviewboard,custode/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,beol/reviewboard