title: ReactJS, material-ui TextField onChange not working
body: <p>I am using <a href="https://v0.material-ui.com/#/" rel="noreferrer">Material-UI</a> (version v0.20.1) with ReactJS (version 15.5). This code is expected to work, but it doesn't. I always used the TextField in the same way, but here in the new component, I can't type anything in the input and the onChange() is not firing. What would be a possible reason? even a 'console.log' in onChange() does not show up!!!</p>
  
  <pre><code>import TextField from 'material-ui/TextField';
  
  class Nav extends Component {
  
   constructor() {
     super();
       this.state = {
        searchValue: '',
       }...
  </code></pre>
  
  <p>I am using the TextField like always:</p>
  
  <pre><code>&lt;TextField
    value={this.state.searchValue}
    onChange={(event, value) =&gt; {
    this.setState({ searchValue: value });
  }}
  /&gt;
  </code></pre>