Changed default avatars to PNG as agreed with Mike here: https://redmatrix.nl/channel/jeroenpraat/?f=&mid=83603d8f0876c040efafce87755fcd252dbe8da4a75d82fdb230519e3c8dcb72@redmatrix.nl. Added a few new. You can set it like this: util/config system default_profile_photo red_avatar