title: Change color of placeholder for select field in sencha
body: <p>I am able to achieve for input field using css</p>
  
  <pre><code>input::-webkit-input-placeholder {
     color: red !important;
  }
  </code></pre>
  
  <p>But what about select field? Fyi, I am using sencha framework.
  Really appreciate if someone could help me out.</p>