add sig to a card's first comment+discussion

I know Ethan wants to redo commenting a different way that would make this irrelevant, but if that's far enough in the future and this is easy to do, may as well. --John

I think I'm going to close this and focus discussion on show comment box on nonexistent inclusions (which is basically a specific solution to the above)

  --Ethan McCutchen.....2013-04-04 20:29:12 +0000