Polished auth flow including ReservedRoute and role selection.

src/App.tsx

@@ -31,7 +31,7 @@ export const App: FC = () => {
     // Initialize asking the server if this session is already logged in.
     isAuthenticated().then((responseState) => setIsAuth(responseState));
     getRole().then((responseRole) => setRole(responseRole));
-  }, []);
+  }, [isAuth, role]);
 
   return (
     <div data-testid="App">