Refactor Home to be amenable to use inside the Screen Navigator

There are a couple of issues in the Home screen that prevent its use in the Screen Navigator:

1. Home causes a page transition using window.location upon load to ensure that we get the correct strings bundle for the current locale. This should refactored to use an as-yet non-existent SN API

2. Makes references to itself in links with relative URLs that aren't fully qualified. So:
./Home.html
should be changed to
../home/Home.html

3. Home rewrites URLs on click instead of when the langugage is selected, causing a condition where the Screen Navigator can't correctly operate on those link URLs at click time since they haven't been rewritten yet