WL-172 Show a Order History list on the Student Dashboard for any PaidCourseRegistration or RegCodeItem that the user might have purchased

Change third party auth login failure code to a 401, to detect authentication
success with no linked account.

If already authenticated, redirect immediately to the dashboard.

Use "Location" header correctly for 302 redirects from student views.

Add utility functions for simulating a running third-party auth pipeline.

Add a utility function for checking whether third party auth is enabled.

Respect default values sent by the server

Make HTML comments Mako comments

Make donations configurable

Added donation button to dashboard

Generalize merchant defined data for payment processor

Change the reverification failure message styling.

Changing templates so new styles do not appear in courseware.

Removing unused aria tag.

PR comments on cleaning up SASS

Fix signup LMS test.

Copy changes per review on PR

Updating based on PR comments

Style and HTML changes for notifications

The body of the enrollment message template

Tokenize platform name in message.

Changing to a datetime enrollment approach

Adding sorting. A little refactoring.

Adding confguration model for time delta

Adding admin registration and basic form for new config model.

Fixing docstring typo

Updating default time delta to 0, adding test to show it disabled functionality.

Removing the form from configuration and tweaking the enrollment message html

[LMS-11372]
[LMS-11370]

This reverts commit 1955aade36675289bdbc01554b6f74242754a746.

Updating EX-60 logic

Add little more logic for paid courses

LMS-2510

* Don't show sidebar if only one language is present
* only add in the default language code if it's not already present

Also, refactor tests such that we're not deleting users or prefs

LMS-2156

Added a banner that students can use to dismiss the "you have failed reverification" message.  Also, removed unused code, wired up the sidebar for design

Also, removed an unused template

Added verification sidebar, banner for major courseware sections, quality & test improvements