Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- app/controllers/home_controller.rb
- app/controllers/shares_controller.rb
- app/javascript/packs/public.js
- app/models/status.rb
- app/serializers/initial_state_serializer.rb
- app/views/home/index.html.haml
- app/views/layouts/public.html.haml
- app/views/public_timelines/show.html.haml
- app/views/shares/show.html.haml
- app/views/tags/show.html.haml
- config/initializers/content_security_policy.rb
- config/locales/en.yml
- config/webpack/shared.js
- package.json

app/views/layouts/public.html.haml

@@ -1,3 +1,6 @@
+- content_for :header_tags do
+  = render_initial_state
+
 - content_for :content do
   .public-layout
     - unless @hide_navbar