Tweak to class changes grid - title display only

This should address #855.  I think the key issue here was that at one point we made it possible to show class titles, and at another point we made it possible to show class descriptions, and those weren't really coordinated.  After loading the class change grid you would see the class titles, and if you checked "display only class numbers", those would go away, but unchecking it would cause the entire class description to be displayed (not just the title).  I've commented out support for displaying the entire class description inline, since I think this was somewhat confusing and unnecessary.