Improve admin UI for accounts (#7360)

* Improve design of account statuses admin UI (consistent with reports)

* Make account moderation notes look consistent with report notes

* i18n-tasks remove-unused

* Fix code style issues

* Fix tests

config/routes.rb

@@ -135,7 +135,7 @@ Rails.application.routes.draw do
     end
 
     resources :reports, only: [:index, :show, :update] do
-      resources :reported_statuses, only: [:create, :update, :destroy]
+      resources :reported_statuses, only: [:create]
     end
 
     resources :report_notes, only: [:create, :destroy]
@@ -156,7 +156,7 @@ Rails.application.routes.draw do
       resource :silence, only: [:create, :destroy]
       resource :suspension, only: [:create, :destroy]
       resource :confirmation, only: [:create]
-      resources :statuses, only: [:index, :create, :update, :destroy]
+      resources :statuses, only: [:index, :create]
 
       resource :role do
         member do