Scroll position is maintained even when it shouldn't be.

[isTravis]

To reproduce:

1. Navigate to https://react-redux.herokuapp.com/
2. Scroll to the bottom of the page
3. Click the Survey button in the top nav bar

Notice that you are not navigated to the top of the Survey page, but still scrolled down.

Maintaining scroll position is great for going back or forwards through history, but on new page navs, we should default to the top.

[isTravis]

Doh. As soon as I posted I found what seems like a working solution.

There's recent discussion about this problem within react-router. See:
remix-run/react-router#2471
remix-run/react-router#2144

The outcome of those is a package called scroll behavior.

Seems to be a working fix for me. In src/client.js, I have the lines:

import createHistory from 'history/lib/createBrowserHistory';
import useScroll from 'scroll-behavior/lib/useStandardScroll';
const scrollablehistory = useScroll(createHistory);
const store = createStore(reduxReactRouter, makeRouteHooksSafe(getRoutes), scrollablehistory, client, window.__INITIAL_STATE__);```

Some irrelevant lines omitted, but hopefully you get the idea.

[erikras]

PR welcome...

[erikras]

Fixed by #560.