Displaying Insights Link for All Instructors
Remove unimplemented grade_summary feature.
Merge pull request #5401 from edx/insights-for-all

Displaying Insights Link for All Instructors
Merge pull request #5290 from mitocw/bdero/fix-grade-summary-opaque-keys

Remove unimplemented legacy dashboard grade_summary feature
TNL-172: Change type of a previously posted post.
Make the thread_type field updatable.
Make sure 'Marked as Answer/Unmark as answer' is present when thread type is question and not when thread type is discussion.
Update ThreadView on save.
Fixed Jasmine unit tests.