title: How to make the default text in a select field grey like the placeholder for textfields?
body: <p>I have the following select field in a form:</p>
  
  <pre><code>        {
              xtype: 'selectfield',
              name: 'minprice',
              label: 'Min Price',
              valueField: 'No min',
              placeHolder: 'No min',
              useClearIcon: true,
              options: [{
                  text: 'No Min', value: 'Test'
              }, {
                  text: 'Test2', value: 'Test2'
              }, {
                  text: 'Test3', value: 'Test3'
              }]                  
          }
  </code></pre>
  
  <p>I would like the first option 'No min' to look like a place holder (so it's light grey). The reason for this is that the rest of the form has placeholders in light grey and having a select field with black text doesn't fit the style of the form. I've tried specifying a placeholder and the the valueField with no success.</p>
  
  <p>Thanks.</p>