Mahoney

// Overview of how this works:
// 1. Initialisation data is used to create an instance of LoadedRoot.
// 2. LoadedRoot contains a component which is the virtual top-level component.
//    It uses the initialisation data and can be sure that it won't change (a guarantee you don't have with component props).
//    It's the only component to have state.
//    The state can applies to the entire SPA, all routes.
//    It gets told by the router which page to render.
//    It can house logic that applies when certain pages change to certain other pages.
// 3. LoadedRoot is passed to Routes.routerConfig.
//    Routes.routerConfig creates a config that sends all routes to the LoadedRoot component, using the Page & RouterCtl as props.