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

db/migrate/20190403141604_add_comment_to_invites.rb

@@ -0,0 +1,5 @@
+class AddCommentToInvites < ActiveRecord::Migration[5.2]
+  def change
+    add_column :invites, :comment, :text
+  end
+end

db/migrate/20190815225426_add_last_status_at_to_tags.rb

@@ -0,0 +1,6 @@
+class AddLastStatusAtToTags < ActiveRecord::Migration[5.2]
+  def change
+    add_column :tags, :last_status_at, :datetime
+    add_column :tags, :last_trend_at, :datetime
+  end
+end