Make sure it's possible to create a combined notification widget
that features both alerts and messages.
Change-Id: I4b3f263039f54430a61acc1a261d8aca8e894a90
This simplifies the operation of the API a bit, but more importantly
this will let us create a demo where we can manipulate the API result
and test various new notification formats while the work on the
backend API responses is ongoing, and also will allow us to have a
constant test for all notifications types, including backwards
compatibility.
Change-Id: I6081329a287cda4f5f1f1604ace5d04ff8d9fe3d