Merge commit 'e770303968dc04d20dd5f3a5d7da3b9d7ba888fc' into glitch-soc/merge-upstream

Conflicts:
- `.rubocop_todo.yml`:
  Glitch-soc had different overrides, but upstream simply disabled the rules.
  Disabled them as well.
- `app/serializers/initial_state_serializer.rb`:
  Not really a conflict, again because of a rubocop comment.

app/javascript/material-icons/400-24px/format_quote_off.svg

@@ -0,0 +1 @@
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