title: Extjs data not loading completely
body: <p>I am using ExtJS and I noticed that it doesn't seem to load the full list. Its loads the partial list and hangs up.</p>
  
  <p>I have to refresh or extend the <code>popupwindow</code> to load the data completely. </p>
  
  <p>How can I fix this?</p>
  
  <pre><code>var mystore = new Ext.data.Store({
      url: '/jsonfeed&amp;id=' + encodeURIComponent(this.idUrl),
      sorters: [{
          property: 'ImpactSummary',
          direction: 'DESC'
      }],
      reader: new Ext.data.JsonReader({
          root: 'xml.RowElement',
          fields: [{
              name: 'DisplayName',
              mapping: 'DisplayName'
          }, {
              name: 'ImpactSummary',
              mapping: 'ImpactSummary',
              type: 'int'
          }, ]
      }),
  
  });
  
  var listView = Ext.create('Ext.grid.Panel', {
      store: mystore,
      multiSelect: false,
      splitHandleWidth: 10,
      width: 350,
      height: 670,
  
      columnLines: true,
  
  
      //reserveScrollOffset: true,
      renderTo: containerEl,
  
      columns: [{
          text: "DisplayName",
          dataIndex: 'DisplayName',
          renderer: showDisplayName,
          sortable: true,
          flex: 60
      }, {
          text: "ImpactSummary",
          dataIndex: 'ImpactSummary',
          renderer: showElementName,
          sortable: true,
          flex: 40
      }]
  });
  //pass along browser window resize events to the panel         
  Ext.EventManager.onWindowResize(listView.doLayout, listView);
  console.log('Ext version ' + Ext.version);
  </code></pre>