title: Combo box in Extjs editor grid not displaying initally
body: <p>I am trying to edit an information using editor grid. I have three fields, Interview By (combo), Date (date) and Performance (number), I get the date and the performance column, but the combo is not displaying the value initially. But when I click, then it shows the correct value. I am new to extjs and googled it for a solution, but could not find it. Kindly help me with a solution. Thanks in advance.</p>
  
  <p><strong>MY CODE:</strong> </p>
  
  <pre><code>initComponent: function() {
      this.createTbar(); 
      this.columns = [
          { xtype:'numbercolumn', 
            hidden:true,
            dataIndex:'interview_id', 
            hideable:false
          },
          {   xtype: 'gridcolumn',
              dataIndex: 'interview_by_employee_id',
              header: 'Interview By',
              sortable: true,
              width: 290,
              editor: {
                  xtype: 'combo',
                  store: employee_store,
                  displayField:'employee_first_name',
                  valueField: 'employee_id',
                  hiddenName: 'employee_first_name',
                  hiddenValue: 'employee_id',
                  mode: 'remote',
                  triggerAction: 'all',
                  forceSelection: true,
                  allowBlank: false ,
                  editable: false,
                  listClass : 'x-combo-list-small',
                  style: 'font:normal 11px tahoma, arial, helvetica, sans-serif'
  
  
          },
          renderer: function(val){
              index = employee_store.findExact('employee_id',val); 
              if (index != -1){
                  rs = employee_store.getAt(index).data; 
                  return rs.employee_first_name; 
              }
          }
  
          },
          {   xtype: 'gridcolumn',
              dataIndex: 'interview_date',
              header: 'Date',
              sortable: true,
              readOnly: true,
              width: 100,
              editor: {
                  xtype: 'datefield'
              }
          },
          {   xtype: 'numbercolumn',
              header: 'Performance',
              format:'0',
              sortable: true,
              width: 100,
              align: 'right',
              dataIndex: 'interview_performance',
              editor: {
                  xtype: 'numberfield'
              }
          }
      ];
      candidate_grid_interview.superclass.initComponent.call(this);
  }
  </code></pre>
  
  <p>and the screen shots,</p>