The CSS is also restructured a bit to style both the progress bar and
the status text based on the state of the upload using a single class
on the parent element.

TNL-652

TNL-920

This changes the style of the inactive libraries/courses tab when hovering.

Only the active tab on the dashboard page gets the blue underline.
When hovering over an inactive tab, the color of the text changes,
but the underline does not appear.

Admin ("Instructor") - Can edit and assign permissions to other users
Normal ("Staff") - Can edit
User - Can view the library and use content from it but cannot edit it or its blocks.

SOL-1, SOL-2, SOL-3

The button downloads the CSV data containing all video URLs.

* updating vendor files
* updating class syntax (to new FA-based classes) for all UI elements
* correcting broken tests

SASS compilation variable conventions update, focusing on basic colors, baseline variable usage for padding and margins, ui-depth extends, along with other small fixes. The intent with this is to not have any user-facing impact, and instead move us closer toward having files that use our newer sass conventions.

TNL-1070

TNL-920

Co-authored-by: Greg Price <gprice@edx.org>

OPEN-304

* removing unused font-family-centric Sass variables
* removing unused graphic images and Sass references
* clean up of style removal fallout