title: Angular - Tooltip does not show for disabled buttons in Chrome
body: <p>I have this code for buttons and I want to shows the tooptips for disabled button. This works fine in Firefox and IE, but does not work in Chrome. In Chrome, only the buttons that are enabled showed the tooltip.</p>
  
  <pre><code>&lt;div *ngFor"let btn of buttons"&gt;
     &lt;button [tooltip]="'Tooltip'" [disabled]="btn.disable"&gt;
  &lt;/div&gt;
  </code></pre>