Adjust naming of user and model attributes

- Remove unnecessary attributes that cause additional SQL queries
- Remove unneeded check for nil on current_item

app/models/artist.rb

@@ -519,7 +519,7 @@ class Artist < ApplicationRecord
 
   module ApiMethods
     def html_data_attributes
-      [:creator_id, [:wiki_page, :id]]
+      [:creator_id]
     end
   end
 

app/models/wiki_page.rb

@@ -117,7 +117,7 @@ class WikiPage < ApplicationRecord
 
   module ApiMethods
     def html_data_attributes
-      [:category_name, [:artist, :id]]
+      [:category_name]
     end
   end