title: Styling option group label
body: <p>Is it possible to style just the label of the optgroup in drop-down selector?</p>
  
  <pre><code>&lt;select&gt;
      &lt;optgroup label="Group Name"&gt;
          &lt;option&gt;My option&lt;/option&gt;
      &lt;/optgroup&gt;
  &lt;/select&gt;
  </code></pre>