fix: render/style responsive video/audio player (off of main)

[wesleyboar]

Overview

Support responsive embed of a podcast (or any audio or video).

Related

• mimics fix: render/style responsive video/audio player (off of v3.11.4) #684

Changes

• added site.v3-11-plus.css
  ^{to load existing …/django-cms-video.css}
• added link to site.v3-11-plus.css
  ^{in taccsite_cms/templates/assets_site.html}

Testing

1. Create/Open a test page.
   ^{If deployed to Texascale, you may use https://prod.texascale.tacc.utexas.edu/testing/wes-test/?edit.}
2. Add a "Video player" plugin instance.

   Field	Value
   TEMPLATE:	Responsive Automatic
   LABEL:	Podcast
   EMBED LINK:	https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/1242255460

3. Save plugin instance.
4. Verify podcast:
   • renders
   • stretches to fit available horizontal space
   • is not cut off
   • is functional

UI

Relying on #684.