Bind info about the currently mounted route, to parent element property.

[aabluedragon]

Would be nice to have the possibility of binding the name/info of the currently mounted route to a property on it's parent, while not using :param, for example:

'nav': routeCfg(
          path: '/nav',
          view: 'view-navigation',
          defaultRoute: true,
          mount: {
            'dashboard':routeCfg(
                path: '/dashboard',
                view: 'view-dashboard',
                defaultRoute: true,
                enter: (rt.RouteEnterEvent route) => router.go('nav.dashboard', {})),
            'employees':routeCfg(
                path: '/employees',
                view: 'view-employees')
          })

In the above example, In view-navigation polymer element, I would like to have a property bound to the name of either employees or dashboard, or maybe even bind a reference to the actual element, or something similar such a 'currentRouteInfo', a RouteInfo object.

Use case: when working with a paper-drawer-panel, and in the Drawer there are buttons that redirect to the chosen pages, and you want to have a radio group instead of button, so it's visible which one is chosen in the Drawer.