Moderation leftovers & polish

[hackergrrl]

The Mozilla MVP Spring Lab work went really well. Cabal now has a subjective moderation system! :tada:

This issue is to consolidate & track remaining efforts to make moderation even more useful, accessible, and understandable.

• [ ] Per-channel moderation operations
• [ ] Modify materialized-group-auth to be unordered
• [ ] Private moderation operations
• [ ] Fix https://github.com/cabal-club/cabal-core/issues/91
• [ ] Write low level/white paper-esque documentation on how moderation works
• [ ] Make a video demo for the public/website
• [ ] https://github.com/cabal-club/cabal-cli/issues/194
• [ ] Fix unintuitive moderation caveats
  • [ ] https://github.com/cabal-club/cabal-cli/pull/190#discussion_r430021350
  • [ ] https://gist.github.com/cblgh/0912d6ec4872d974da29f752c56951b0