This updates the unread pills in the left and right sidebar
to look better at a wide range of zoom values. (It doesn't change
their appearance at all.)
This commit transitions all styles in app.css in the Django pipeline
to being compiled by webpack in an app-styles bundle, and renames the
various files to now be processed as SCSS.
To implement this transition, we move the old CSS file refernces in
settings.py and replace them with a bundle declared in
`webpack.assets.json` and includedn in the index.html template
Tweaked by tabbott to keep the list of files in `app.css` in
`webpack.assets.json`, and to preserve the ordering from the old
`settings.py`.
Aditya Bansal
Max Nussenbaum
Tim Abbott
Utkarsh Patil
Armaan Ahluwalia