edx/edx-platform — pull request #720 by akjags (2013-08-17 00:28:51+00:00)
Title: Akshay/order commentables

@kevinchugh @caesar2164

We figured out that the reason subcategories weren't getting sorted was that they had a sort_key of None, whereas the entries had a sort_key of their title, so with this simple fix, the already existing sorting mechanism should take care of the subcategory sorting as well.