We remove css which has been dead since convertion of subscriptions
page to an overlay. This should ideally have been dealt with in
commit 1886f0a which actually did the converstion but we forgot to
handle it at that time.
This cleans up some leftover js and css from the effort of
redesign the rows of the #subscriptions table. Redesign happened
in commit 368b5859 and but we forgot to clean up these js and css
pieces.
squash to subs.js.
The user can now specify the value while creating a stream.
An admin can later change it via `Change stream permissions`
modal. Add is_announcement_only to subscription type text.
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`.
