Stanford-Online/class2go — pull request #1656 by jrbl (2013-01-03 04:46:03+00:00)
Title: ContentGroups handle deletion of target items

* Fixes display bug causing deleted child items to be displayed in live
mode (fixes #1652)
* Fixes semantic bug causing item deletion to leave vestigial
ContentGroup entries. New semantic introduced for parent/child
deletion:
- Deletion of the target object also deletes its ContentGroup entry
- Furthermore, if the target object is a ContentGroup parent, its
related ContentGroup children are promoted to be parents.
(fixes #1481)