Merge pull request #2787 from cpradio/add-visible-status

Add visible/invisible status for Advanced Users

lib/topic_query.rb

@@ -288,6 +288,10 @@ class TopicQuery
           result = result.where('topics.closed')
         when 'archived'
           result = result.where('topics.archived')
+        when 'visible'
+          result = result.where('topics.visible')
+        when 'invisible'
+          result = result.where('NOT topics.visible')
         end
       end