title: ExecCommand 'removeformat' for Firefox does not remove text-align
body: <p>I have a div in the editor of FF :</p>
  
  <pre><code>&lt;div align='right'&gt;asdasd&lt;/div&gt;
  </code></pre>
  
  <p>and </p>
  
  <pre><code>&lt;div style="text-align:right"&gt;asdasd&lt;/div&gt;
  </code></pre>
  
  <p>When I select either of these and fire this command using JS :</p>
  
  <pre><code>document.execCommand('removeformat',false,null);
  </code></pre>
  
  <p>These justifications are not removed. WHile this happens on Chrome.</p>