Set @body_classes to admin layout (#9081)

app/controllers/settings/profiles_controller.rb

@@ -7,6 +7,7 @@ class Settings::ProfilesController < ApplicationController
 
   before_action :authenticate_user!
   before_action :set_account
+  before_action :set_body_classes
 
   obfuscate_filename [:account, :avatar]
   obfuscate_filename [:account, :header]
@@ -34,4 +35,8 @@ class Settings::ProfilesController < ApplicationController
   def set_account
     @account = current_user.account
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end