Update region if it has changed after rendering footer (bug 1066774)

Follow-up to #663 
https://bugzilla.mozilla.org/show_bug.cgi?id=1066774

We do wait for the consumer info promise before triggering 'navigate', so the region in the views is OK, but the footer can be rendered before that.


See above, we are not, it's just he default we pass to the method in case no region is set.