Goes back to the previous page in the navigation history, or up one level in the route if the history is empty.
If the navigation history is nonempty, this pops the previous item from the history and makes that the current route.
If the navigation history is empty, this method goes to a route one level above the current route. If the current route is already a top level route, this method does nothing.
- Fuse.Navigation 1.11.2