Using inline svg tags instead of files

I wonder if a different, somewhat lighter (and safer), approach might be to ship default SVG assets as data:// encoded CSS background images within the social_media.css file. This would also let us improve the CLS (Content Layout Shift) for these assets by also providing an explicit height in the CSS file as well.

There's already the option for module users to specify custom libraries, which could add CSS to replace the background images with custom ones.

Thoughts?

Updating patch to support the latest.

The last submitted patch, 8: 2944785-using-inline-svg-tags-instead-of-files-8.patch, failed testing. View results →
- codesniffer_fixes.patch Interdiff of automated coding standards fixes only.