Fix "You cannot change <Router routes>; it will be ignored" error mes…

…sage by implementing solution in Github: remix-run/react-router#2704 (comment)

Router is only instantiated once in a production setting (e.g. not webpack-dev-server), so there is minimal overhead on producing a random key value for `Router`.

common/components/Root/index.jsx

@@ -21,7 +21,7 @@ export default class Root extends Component {
     const { store, history } = this.props;
     return (
       <Provider store={store}>
-        <Router history={history}>
+        <Router history={history} key={Math.random()}>
           <Route name="App" path="" component={App}>
             <Route name="GenerateWallet" path="/" component={GenerateWallet} />
             <Route