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

Conflicts manually resolved:
- app/services/post_status_service.rb
- config/locales/simple_form.pl.yml
- config/routes.rb
- config/webpack/loaders/sass.js
- config/webpack/shared.js
- package.json
- yarn.lock

db/migrate/20181219235220_add_created_by_application_id_to_users.rb

@@ -0,0 +1,8 @@
+class AddCreatedByApplicationIdToUsers < ActiveRecord::Migration[5.2]
+  disable_ddl_transaction!
+
+  def change
+    add_reference :users, :created_by_application, foreign_key: { to_table: 'oauth_applications', on_delete: :nullify }, index: false
+    add_index :users, :created_by_application_id, algorithm: :concurrently
+  end
+end

db/migrate/20181226021420_add_also_known_as_to_accounts.rb

@@ -0,0 +1,5 @@
+class AddAlsoKnownAsToAccounts < ActiveRecord::Migration[5.2]
+  def change
+    add_column :accounts, :also_known_as, :string, array: true
+  end
+end