title: How can I overlay a ProgressSpinner in PrimeNG?
body: <p>I have a progressBar spinner like this :</p>
  
  <pre><code>&lt;p-progressSpinner&gt;&lt;/p-progressSpinner&gt;
  </code></pre>
  
  <p>I want to make it center and overlay. How can I do that ?</p>
  
  <p>Thanks .</p>