The old behaviour was: You open a page without being authorized, you are getting redirected to /login that
redirects you after a successful authentication to /dashboard. This is really annoying if you want to open
listenings directly from your notification adapter for example. This commit introduces a method to redirect
you back to the original page you opened after the authentication process by adding the navigation of the
opened page as state to the navigation to /login. The login component than unpacks the state that contains
the old navigation and redirects the user back to path from the original navigation. The path /dashboard is
used as a fallback if no navigation in the state is present.
