Added Certificates Web/HTML View

fixed a flaky test (acceptance.tests.studio.test_studio_settings_details.SettingsMilestonesTest.test_prerequisite_course_save_successfully)

Awais786/ecom 911 enable noid paid course

Enrolling via E-Commerce API for combined login-registration page

The login-registration page now supports using the E-Commerce API when enrolling users in honor seats (of courses with SKUs).

This new endpoint is intended to replace enrollment API call used on the login+registration page. Instead of directly enrolling students, the view will contact the external e-commerce API (Oscar) to create a new order. Oscar will be responsible for completing the order and enrolling the student.

This behavior will only apply to course modes with associated SKUs. All other course mode enrollments will be processed directly by LMS.

Replace broken logic in import template with working logic in view.

Cleaned up milestones API references

fixes invalid aria-role dialogalert which should be alertdialog

Release

update schoolyourself xblock (TNL-1395)

MA-125 Mobile Enrollment API: add certificate info.

Conflicts:
	lms/envs/common.py (RESOLVED)

Do not show video_upload_pipeline setting if the feature is disabled

hotfix: China CDN cleanup and bugfixes

Add metatag <path_prefix> for pdf_viewer.html

For video module, don't use Mako unnecessarily

ECOM-1177: Removed the session variable on pay_and_verify view

ECOM-1155 fix the date diff issue.