ECOM-369 added meta to header to enable responsive. Set country dropdown to required for registration form

Users may want to start anew when answering a question. This commit decouples reset from randomization while still preserving backward compatibility. Users can clear their input.
Instructors can set course-wide and problem-specific settings for reset button display.

Updating tests for views

Last chunk of tests and pep8 cleanup

Code Review cleanup.

Additional CR comments

Changing serialization of suggested prices.

Use 'defaultValue' instead of 'default' in the form description.  Fix an error that would cause the login and password reset pages to not load correctly.

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 sure that during the serialization, all opaque keys and their
references and serialized using the `unicode` function.

AN-3821

TNL-39

 - fixed parseInt issue

 - PR fixes

 when changing the quantity between enrollment vs reg code cart types.

ECOM-531 updating grid column counts in media queries and added some more classes to style against instead of elements

TE-453

TE-465