When cdn is down specially in the country like china
and others user face problem as application doesn't
work as intended. Instead of making mathjax hard
dependecy I have converted it into soft dependey
so that it won't cause user problem to use application
smothly if mathjax is not present.

TNL-1498

Upgrade PDF.js library from v0.8.1243 -> v1.0.907

china video cdn experiment

ECOM-1140: Instructor dashboard example certificates

Match Studio logo logic to LMS

Add flaky decorator.

Allow global staff to generate example certificates
on the instructor dashboard.

Allow global staff to enable/disable self-generated
certificates for a course.

Change .md file to .rst.

Related to TNL-1642.

Related to TNL-1619.

Fix failing forums unit test.

Ned/finish pr 7232

Certificate status when XQueue is unavailable.

Add empty introspection rule for BlockTypeKeyField.

Use 'edx_lint write' to create our pylintrc from pylintrc_tweaks

Revert "Merge pull request #6771 from edx/dan-f/forums-filter-discussion...

Awais786/ecom 1158 upgrade page

Show a select box when editing a library content block (SOL-123)

use 'commit_on_success' transaction decorator to avoid registering users...

From 0.7 on, South requires explicit introspection rules. Previously, it used the parser module to introspect.

This reverts commit 086a2ba7, reversing
changes made to a44132ec.  Some minor
code quality issues were addressed as part of this change.

Conflicts:
	lms/djangoapps/django_comment_client/base/views.py
	lms/djangoapps/django_comment_client/utils.py

SettingsService for accessing django settings from XBlock

Studio header nav label accessibility issue

If certificates cannot be added to the queue,
mark the certificate status as 'error' so that
it can be re-run by management commands.

Clean up logging and return values.

Fix callback URL for certificate generation tasks