Set default widget sort to created_at

Don't use page category when home

app/controllers/default_widget_controller.rb

@@ -16,16 +16,16 @@ class DefaultWidgetController< OrbitWidgetController
     if !params["tag_id"].blank?
       @tag = Tag.find(params["tag_id"]) rescue nil
       if params["category_id"].blank?
-        result = @tag.send(ori_class_name.downcase.pluralize)
+        result = @tag.send(ori_class_name.downcase.pluralize).desc(:created_at)
       else
-        result = @tag.send(ori_class_name.downcase.pluralize).where(get_category_field_name(ori_class_name) => params['category_id'])
+        result = @tag.send(ori_class_name.downcase.pluralize).where(get_category_field_name(ori_class_name) => params['category_id']).desc(:created_at)
       end
     elsif params["category_id"].blank?
-        result = eval(@default_widget["query"])
+        result = eval(@default_widget["query"]).desc(:created_at)
       else
-        result = eval("#{ori_class_name}.where(get_category_field_name(ori_class_name) => params['category_id'])")
+        result = eval("#{ori_class_name}.where(get_category_field_name(ori_class_name) => params['category_id'])").desc(:created_at)
     end
-    result.available_for_lang(I18n.locale).can_display
+    result.available_for_lang(I18n.locale).can_display.desc(:created_at)
   end
 
   def default_widget