- If a `logout` event is send the user should be redirected to the
homepage, there are three mechanism that can do this. The response of
`/user/logout` and the event listener of notifications or stopwatch.
It's essentially a race for what's processed first to determine which
mechanism takes care of redirecting the user.
- Fix that the redirection mechanism of the notification and stopwatch
event listener redirects to an absolute URL.
- Ref: #2135