title: Material-UI: How to show search icon in input field in react?
body: <p>I am using <a href="https://material-ui.com" rel="noreferrer">material ui</a>. I want to show <code>search icon</code> in input field as shown in image
  <a href="https://i.stack.imgur.com/MOVhN.png" rel="noreferrer"><img src="https://i.stack.imgur.com/MOVhN.png" alt="enter image description here"></a> </p>
  
  <p>I am using <a href="https://material-ui.com/demos/text-fields/" rel="noreferrer">this API</a></p>
  
  <p><a href="https://codesandbox.io/s/4ryxnokj4x" rel="noreferrer">Here</a> is my code</p>
  
  <p>I am able to show <code>TextField</code> but I am not able to add a search icon. 
  Could you please add how to add ?</p>
  
  <pre><code> &lt;TextField id="standard-bare" defaultValue="Bare" margin="normal" /&gt;
  </code></pre>