Refresh session performance 2: Fresh nonce prefetching.

[alextok]

The issue is related to scenario described here: #60

However, if there is a complaint about waiting for a response, the underlying issue is the lack of a fresh nonce when the device or web app has been inactive for a while.

If the device has been unused or the web app is inactive, the auth cookies will expire. Before allowing workload requests, the cookie needs to be updated. To make an update for one request, the client needs a fresh nonce.

We can apply multiple approaches:

1. Utilize a browser service to pre-fetch the nonce from the web.
2. Allow an operating system component to pre-fetch the nonce and have the browser read it.