fix(logout): Redirect to email first if user is at settings but not valid session

[vbudhram]

Because

• We currently show the "General application error" message when user is in settings page but the underlying session token becomes invalid
• I suspect its how the pages are being lazy loaded, we did have logic to do this redirect but

This pull request

• Does a simple redirect if user is not signed in

Issue that this pull request solves

Closes: https://mozilla-hub.atlassian.net/browse/FXA-12309

Checklist

Put an x in the boxes that apply

• My commit is GPG signed.
• If applicable, I have modified or added tests which pass locally.
• I have added necessary documentation (if appropriate).
• I have verified that my changes render correctly in RTL (if appropriate).

Other information (Optional)

There is probably a better way to do this and we should try to find the actual reason why its failing.

[chenba]

Looks fine. But I was half expecting isSignedIn to be incorrect given the nature of teh bug.

[chenba]

Thanks. Please squash the commits.