title: Angular kendo-dropdownlist defaultItem not working
body: <p>I have a kendo-dropdownlist for which I want to display a placeholder/defaultItem.
  Placing defaultItem=&quot;Select item...&quot; as per the documentation breaks the view.
  Is there something wrong in my implementation?</p>
  <p>Demo:
  <a href="https://stackblitz.com/edit/angular-gavisy?file=app/app.component.ts" rel="nofollow noreferrer">https://stackblitz.com/edit/angular-gavisy?file=app/app.component.ts</a></p>