title: Need to show hours as 07:00, 15:00, 23:00 (8 hrs increment) in EXTJs timefield
body: <p>I need to show hours as 07:00, 15:00, 23:00 (8 hrs increment) in EXTJs timefield, but when I used the following code, it is not giving the desired output, can some one help me, if I am missing something.</p>
  
  <pre><code>Ext.create('Ext.form.Panel', {
      title: 'Time Card',
      width: 300,
      bodyPadding: 10,
      renderTo: Ext.getBody(),
      items: [{
          xtype: 'timefield',
          name: 'in',
          fieldLabel: 'Time In',
          format : 'H:i',
          minValue: '07:00',
          maxValue: '23:00',
          increment: 480,
          anchor: '100%'
      }]
  });
  </code></pre>
  
  <p>Thanks in Advance.</p>