For the 'fall-through' condition for Angular routing, it will
simply redirect to the URL wanted. Basically, Angular says: "If
I don't know this URL in my internal routing, it's outside the
single-page-app and needs to be pulled from the server." However,
the code uses the general Angular path, which does NOT include
the base tag's prefix, meaning in a situation where WEBROOT is set
to other than '/' it will not include the base value, and route to
a non-WEBROOTed path. Using absUrl correctly uses the full path.
Change-Id: Idbf91bd5913937788bf31bcf1d389c590dd3e2d7
Closes-Bug: 1597823
eb60a8b287