hide approval mod actions, better logic for user promotion/demotion mod actions

config/schedule.rb

@@ -12,6 +12,10 @@ every 1.day do
   runner "Upload.delete_all(['created_at < ?', 1.day.ago])"
 end
 
+every 1.day do
+  runner "ModAction.delete_all(['created_at < ?', 3.days.ago])"
+end
+
 if environment == "production"
   every 1.hour do
     runner "AmazonBackup.execute"