title: how to add tinymce listbox values in windowmanager
body: <p>I open up a windowmanager and add a textfield and listbox:</p>
  
  <pre><code>editor.windowManager.open({
      title: 'Insert caption',
      body: [
          {type: 'textbox', name: 'text', label: 'text', 'multiline': 'true', 'minWidth': 450, 'minHeight': 100},
          {type: 'listbox', name: 'align', label: 'align', 'values': ['pull-left','pull-right']}
      ],
  </code></pre>
  
  <p>The listbox is displayed, but not the values. In the documentation (<a href="http://www.tinymce.com/wiki.php/api4:class.tinymce.ui.ListBox">http://www.tinymce.com/wiki.php/api4:class.tinymce.ui.ListBox</a>) it states: "Array with values to add to list box."</p>
  
  <p>What am I doing wrong?</p>