silverstripe/sapphire — pull request #271 by halkyon (2012-03-26 09:10:26+00:00)
Title: BUGFIX Nested Group records should be removed, along with the parent.

When deleting a parent group, the nested groups become orphaned. This patch deletes the nested groups when the parent is deleted.

This issue has been around a long time: http://open.silverstripe.org/ticket/2985