* Remove old bookmark column ignores to follow up b22450c7a8d378b32291743ca602cbc477dea106
* Change some group site setting checks to use the _map helper
* Remove old secure_media helper stub for chat
* Change attr_accessor to attr_reader for preloaded_custom_fields to follow up 70af45055ae24dc7eb1a20678a52ed3ec69421c3