Changes for sub_roles

Issues: update doesn't create new i18n_variables, role form has bugs

app/models/design/design.rb

@@ -36,7 +36,7 @@ class Design
     self.files = (attrs << 'images')
   end
   
-  # Update or create the attribute_model records
+  # Update or create the attribute records
   def files=(attrs)
     case attrs.last
       when 'layout'