Improve svg-based icons

[wm75]

Don't know if they are used outside of the people pages, but on e.g. the /freiburg/people/ page Matrix, Mastodon, orcid, linkedin, researchgate and google scholar are all using SVGs and the way these get rendered makes them unrecognizable.

[dannon]

#3763 normalizes a lot of content and introduces an icon component that'll clean a lot of the in-page SVG issues, but which are you seeing at the top level people page? These appear correctly to me:

[wm75]

I marked a few in your screenshot (linkedin and google scholar are recognizable, but can you guess the others?).

This is, of course, not high priority. Just wanted to make you aware that this could be nicer.

[dannon]

Ahh! I thought you were saying they were rendering incorrectly for you - I understand the request now. Sure thing, we can improve this!