CONTRIB-5077 Notifications - Fixed: Undefined index: recipientemails in mod\dataform\classes\observer\notification.php.
CONTRIB-5147 Rules - Fixed: Use of undefined constant in rule manager.
CONTRIB-5148 Views - Fixed: Inconsistent method visibility in csv view type.
PHPDoc adjustments.
CONTRIB-5149 Views - Fixed: String conversion in csv view export does not work properly.
Release 2.6.4