Uses ModuleStoreEnum in is_xblock_visible_to_students
Get active student count from new analytics data API

Disabled by default.
Do not refund student if a certificate entry already exists for them.

LMS-2920
Merge pull request #4262 from edx/usman/lms2920-no-refund-if-given-certificate

Do not refund student if a certificate entry already exists for them.
Moved GeneratedCertificates.MODES back inside model.

LMS-6631
Merge pull request #4268 from edx/usman/lms6631-certificate-mode

Moved GeneratedCertificates.MODES back inside model.
Fixed urlpatterns regex for support views in dashboard app.

LMS-6634
Merge pull request #4281 from edx/usman/lms6634-support-page-url-matching

Fixed urlpatterns regex for support views in dashboard app.
Misuse of 'gettext' into mako templates

To translate strings in mako templates, the pattern of ```${_()}``` should be used instead of ```gettext``` even if the strings to be translated is located in a ```script``` block.
BLD-1117: Add read-only list of Group Configurations.
Revert "ORA2 release-2014-06-30T13.39; update EASE to bump the NLTK version to 2.0.4"

This reverts commit f40834fa2ff09c39690659658029614a2c5b6034.
Merge pull request #4282 from louyihua/fix-name-in-studio

Misuse of 'gettext' in mako templates
Refactor global var setup for forum Jasmine tests

Originally reviewed in #4072
Re-design forum thread list

Use larger and lighter title font, decrease padding, and use lighter
solid backgrounds instead of gradients. Also, refactor SASS code to
conform better to our new style, including using more specific class
names.

Originally reviewed in #4072
Add labels to forum thread list

A thread will be labeled if it is pinned, if the user is following it,
or if it was authored by a staff member or community TA. This also
slightly changes the color used for community TA labels.

Originally reviewed in #4072
Make "load more" in forums not appear incorrectly

The rendering of the link happens in an event handler, and the
collection's attributes were not getting set properly before the reset
event triggering the rendering occurred.

Originally reviewed in #4072
Improve forum sorting and cohort filtering UX

Thread entries now show an activity count that includes the original
post, and only one of the vote count and activity count is displayed
based on the user's selected sort. The sorting and filtering options now
both use a select and are somewhat more verbose, and the visual styling
of the sort/filter bar is updated.

Originally reviewed in #4165 with a bugfix in #4211
Update discussion tab sidebar header

The home button is removed, the search box is always displayed, and many
visual adjustments are made, along with a large amount of refactoring.

Originally reviewed in #4211
Adds subtree_edited_on, subtree_edited_by, and fixes has_changes
Merge pull request #4291 from edx/forum-sidebar-improvements

Forum sidebar improvements