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.
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.
Adds subtree_edited_on, subtree_edited_by, and fixes has_changes
Merge pull request #4291 from edx/forum-sidebar-improvements

Forum sidebar improvements
Merge pull request #4273 from edx/benmcmorran/subtree-edited-info

Adds subtree_edited_on, subtree_edited_by, and fixes has_changes
Missing "_()" in course_module.py
Make the strings in "Advanced Settings" page localizable

The fields should be translated before render into html templates.
Merge pull request #4286 from louyihua/studio-advanced-settings-localization

Make the strings in "Advanced Settings" page localizable
Add FEATURE['ENABLE_GROUP_CONFIGURATIONS'] and os.environ['FEATURE_GROUP_CONFIGURATIONS'].
Merge pull request #4289 from edx/will/revert-ora2-release

Revert ORA2 release
Merge pull request #4267 from edx/tim/feature-group-configurations

BLD-1217: Create feature flag for switching Group Configurations editing on and off
Merge pull request #4287 from louyihua/localization-cms

Missing "_()" in course_module.py