civicrm/civicrm-core — pull request #4415 by sdragnev (2014-10-21 14:33:43+00:00)
Title: CRM-15428 - CiviEvent - Add participants to a group

Adds the ability to add participants records to a group via the actions dropdown on a participants list page.
https://issues.civicrm.org/jira/browse/CRM-15428