Bug 1112135 - [Messages] When starting as an activity/notification/, delay threads rendering until the right panel is open. r=julien

> do you think we'd eventually need a different event for each phases (like we have before/after in each panel, should have an event before and after calling these lifecycle functions?) ?

I suspect that we'll have use cases for this, so yeah I think we'll need some more events. Btw WinJS that I mentioned has 3 such events: _beforenavigate_, _navigating_, _navigated_.
[1] http://msdn.microsoft.com/en-us/library/windows/apps/br229838.aspx