This keeps the version field empty, as well as the links, until it gets a response from the `version.xml` request. It then displays an error message if there was an error trying to get the version.
Fixes#1351 by including a call to `version.xml` to get the most up-to-date offline build version, defaulting to the current version, `456.0.3`. This also fixes#1352 by switching the route to `/download`, with a redirect from `/scratch2download/`