appcelerator/titanium_mobile — pull request #3738 by ayeung (2013-01-19 00:03:54+00:00)
Title: TIMOB-11796: Exposed 'activity' property on tabgroups

https://jira.appcelerator.org/browse/TIMOB-12338

Backport of https://jira.appcelerator.org/browse/TIMOB-11796