Convert classes to use data attributes

- Remote resolved classes on post flags since they were unused

app/models/dmail.rb

@@ -148,7 +148,7 @@ class Dmail < ApplicationRecord
 
   module ApiMethods
     def html_data_attributes
-      [:owner_id, :from_id, :to_id]
+      [:owner_id, :from_id, :to_id, :is_read?]
     end
   end
 

app/models/user_feedback.rb

@@ -42,7 +42,7 @@ class UserFeedback < ApplicationRecord
 
   module ApiMethods
     def html_data_attributes
-      [:user_id, :creator_id]
+      [:user_id, :creator_id, :category]
     end
   end