title: Redux Devtool (chrome extension) not displaying state
body: <p>I am new with Redux and newer with Redux devtool.</p>
  
  <p>I made a simple app in which you click on a user and it display some data about him.</p>
  
  <p>So basically in the state I have the current selected user.</p>
  
  <p><strong>But I don't know why the state keep beeing empty in redux devtool</strong>. (not in the app)</p>
  
  <p>Here is where I create my store : </p>
  
  <pre><code>import React from 'react';
  import ReactDOM from 'react-dom';
  import { Provider } from 'react-redux';
  import { createStore, applyMiddleware } from 'redux';
  
  import App from './components/app';
  import reducers from './reducers';
  
  const createStoreWithMiddleware = applyMiddleware()(createStore);
  
  ReactDOM.render(
    &lt;Provider store={createStoreWithMiddleware(reducers)}&gt;
      &lt;App /&gt;
    &lt;/Provider&gt;
    , document.querySelector('.container'));
  </code></pre>
  
  <p>And here is the action :</p>
  
  <pre><code>export const USER_SELECTED = 'USER_SELECTED'
  export function selectUser(user){
      return {
          type : USER_SELECTED,
          payload : user
      }
  </code></pre>
  
  <p>}</p>
  
  <p>Here is a reducer :</p>
  
  <pre><code>import {USER_SELECTED} from '../actions/index'
  export default function (state = null,action){
      switch(action.type){
          case USER_SELECTED :
              return action.payload
      }
  
      return state
  </code></pre>
  
  <p>}</p>
  
  <p>And finally a call to the action :</p>
  
  <pre><code>this.props.selectUser(user)
  </code></pre>
  
  <p>The app works very well but I am probably missing something.</p>
  
  <p>Thanks for your help !</p>