Strip HTML/Markdown from project homepage news snippets

[bouteloua]

Pretty low priority. It would look cleaner if more HTML were stripped from the blurbs/snippets on the homepage of Collection and Umbrella projects, News section.

https://www.inaturalist.org/projects/illinois-botanists-big-year-2019

That is, just show plain text instead of headers, bolding, etc.

[tiwane]

Github issue here: https://github.com/inaturalist/inaturalist/issues/2343

[tiwane]

@bouteloua would you like to keep this open?

[bouteloua]

yep, no harm in keeping it open until implemented

[bouteloua]

Large gaps are being added when there is just a normal line break between these paragraphs:

https://www.inaturalist.org/projects/illinois-botanists-big-year-2020
https://www.inaturalist.org/projects/illinois-botanists-big-year-2020/journal/44515

[tiwane]

Added this specific issue to my weekly report.

[tiwane]

Well, this particular bug should be fixed.