edx/edx-platform — pull request #5554 by jmclaus (2014-10-10 19:27:04+00:00)
Title: Fixed errors in discussion XModule, caused by c2716d470c97bfd01658b815d2...

...f3725628b186fa:

1. Enabled `thread_type` selector for inline discussions
2. Fixed missing `commentable_id` (Javascript null was encoded as string 'null', not null object)

This addresses: https://openedx.atlassian.net/browse/TNL-606