title: ExtJs4 - AutoComplete ComboBox not displaying Empty Text
body: <p>I have a combo-box with following configuration.</p>
  
  <pre><code>{
      fieldLabel:'Service',
      xtype:'combo',
      displayField: 'srvcDesc',
      store: storeServiceCodeVar,
      valueField:'srvcCD',
      id:'serviceCodeId',
      name:'serviceCodeName',
      queryMode: 'remote',
      queryDelay:100,
      typeAhead: true,
      minChars:0,
      hideTrigger:true,
      forceSelection:true,
      maxHeight:23,
      deferEmptyText:false,
      autoSelect:true,
      fieldStyle:'text-transform:uppercase',
      listConfig: {
          loadingText: 'Loading...',
          // Custom rendering template for each item
          getInnerTpl: function() {
              return '&lt;table width="200px"&gt;&lt;tr&gt;&lt;td height="5"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr valign="top"&gt;&lt;td&gt;Code:{srvcCD}&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td height="2"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr valign="top"&gt;&lt;td&gt;Description:{srvcDesc}&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td height="5"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;';
          },
          emptyText:'No Values Found'
      }
  }
  </code></pre>
  
  <p>The issue is that when there is no data returned from the server, then emptyText (which has value - No values found) gets displayed for may be a millisecond and goes off. I want it to stay there till the next query if fired. How is it possible. I have tried with deferEmptyText but no luck.</p>
  
  <p>Could someone throw some light on this. I am using ExtJS 4 and behavior is same in IE9 and Mozilla.</p>
  
  <p>Thanks in advance.</p>