Peertube Interface Update

[LoudLemur]

Some substantial updates to the Peertube GUI:

https://joinpeertube.org/news

[girish]

We have to adjust our tests - https://git.cloudron.io/packages/peertube-app/-/merge_requests/6

[scooke]

@LoudLemur Substantial changes, definitely. I like these: a new modal that makes editing captions really convenient.; how video miniatures appear in all pages that lists videos; "admin" pages for PeerTube platforms administrators have now been separated into an Overview, a Moderation, and a Settings one. (I just copied and pasted for the most part).