title: Single tap not workig in radio field
body: <p>I am trying to generate an event on checking the radio field. The field is checked on a single tap but the event is generated only when i double tap on it.</p>
  
  <p>Anything that am doing wrong. This is the code that I have used.</p>
  
  <pre><code>{
              xtype : 'radiofield',
              //  ui:'plain',
              id : 'r1',
              name : 'sendDoc',
              value : 'Default',
              label : 'Default',
              labelWidth : '50%',
              checked : true,
              //baseCls: 'x-plain',
  
              listeners : {
                  check: function ( radioFld, event, opts ){
                      if(radioFld.isChecked()){
                          Ext.getCmp('workstep').disable();
                      }
                  }
  
              }
          }, 
          {
              xtype : 'radiofield',
              name : 'sendDoc',
              id : 'r2',
              value : 'Source Workstep',
              label : 'Source Workstep',
              labelWidth : '50%',
              listeners : {
                  check : function(radioFld, event, opts ) {
                      console.log(radioFld.isChecked());
                          if (radioFld.isChecked())   {
                              Ext.getCmp('workstep').enable();
                          }
                      }
                  }
  
          }
  </code></pre>
  
  <p>Thanks in advance.</p>