Quick Fix: Add "extend" to model json

RFC: I'm often seeing the pattern where we _.extend some model json inline when
we're fiddling with it. We could save ourselves the trouble and stick 'er right
in the JSON!

Change-Id: Ic564adfa9ccc1f26a1a612a0c90ea591819cf2cb
Merge "Quick Fix: Add "extend" to model json"
Fixed bug with primary navigation

- If this is not a hash, do not use Backbone.history.navigate()