title: Sencha touch list with json store
body: <p>I have a problem with a store that carries the data in a List, the thing is that the store is doing the load but the List stays in Loading, what I'm doing wrong, thanks</p>
  
  <pre><code>Ext.regModel('Properties', {
               fields: [
                  {name: 'idcounty', type: 'string'},
                  {name: 'county', type: 'string'}
              ]
          });
  
          store = new Ext.data.Store({
              model  : 'Properties',
              proxy: {
                  type: 'ajax',
                  url: 'php/response_grid.php?module=countys',
                  reader: {
                      type: 'json',
                      root: 'results',
                      totalCount: 'total'
                  }
              },
              autoLoad:true
          });
  var listPanel = {
              dockedItems: [
                  {
                      title: 'Results',
                      xtype: 'toolbar',
                      ui: 'light',
                      dock: 'top'
                  }
              ],
              layout: 'fit',
              scroll: 'vertical',
              items: [
                  {
                      xtype: 'list',
                      itemTpl : '{county}',
                      store: store,
                      singleSelect: true,
                      onItemDisclosure: function(record, btn, index){
  
                      }
                  }
              ],
              flex:1
          };
  </code></pre>
  
  <p>and the json answer from the php</p>
  
  <pre><code>({"total":"67","results":[{"idcounty":"1","county":"Broward"},{"idcounty":"2","county":"Dade"},{"idcounty":"3","county":"Palm Beach"},{"idcounty":"4","county":"Osceola"},{"idcounty":"5","county":"Lake"},{"idcounty":"6","county":"Orange"},{"idcounty":"7","county":"Seminole"},{"idcounty":"8","county":"Volusia"},{"idcounty":"9","county":"Hillsborough"},{"idcounty":"10","county":"Polk"},{"idcounty":"11","county":"Pasco"},{"idcounty":"12","county":"Pinellas"},{"idcounty":"13","county":"Sarasota"},{"idcounty":"14","county":"Manatee"},{"idcounty":"15","county":"Charlotte"},{"idcounty":"16","county":"Alachua"},{"idcounty":"17","county":"Baker"},{"idcounty":"18","county":"Bay"},{"idcounty":"19","county":"Bradford"},{"idcounty":"20","county":"Brevard"},{"idcounty":"21","county":"Calhoun"},{"idcounty":"22","county":"Citrus"},{"idcounty":"23","county":"Clay"},{"idcounty":"24","county":"Collier"},{"idcounty":"25","county":"Columbia"},{"idcounty":"34","county":"Duval"},{"idcounty":"35","county":"Escambia"},{"idcounty":"36","county":"Flagler"},{"idcounty":"37","county":"Franklin"},{"idcounty":"38","county":"Gadsden"},{"idcounty":"39","county":"Gilchrist"},{"idcounty":"40","county":"Glades"},{"idcounty":"41","county":"Gulf"},{"idcounty":"42","county":"Hamilton"},{"idcounty":"43","county":"Hardee"},{"idcounty":"44","county":"Hendry"},{"idcounty":"45","county":"Hernando"},{"idcounty":"46","county":"Highlands"},{"idcounty":"47","county":"Holmes"},{"idcounty":"48","county":"Jackson"},{"idcounty":"49","county":"Jefferson"},{"idcounty":"50","county":"Lafayette"},{"idcounty":"52","county":"Lee"},{"idcounty":"53","county":"Leon"},{"idcounty":"54","county":"Levy"},{"idcounty":"55","county":"Liberty"},{"idcounty":"56","county":"Madison"},{"idcounty":"58","county":"Martin"},{"idcounty":"59","county":"Monroe"},{"idcounty":"60","county":"Nassau"},{"idcounty":"61","county":"Okaloosa"},{"idcounty":"62","county":"Okeechobee"},{"idcounty":"63","county":"Putnam"},{"idcounty":"64","county":"Sumter"},{"idcounty":"65","county":"Taylor"},{"idcounty":"66","county":"Union"},{"idcounty":"67","county":"Wakulla"},{"idcounty":"68","county":"Walton"},{"idcounty":"69","county":"Washington"},{"idcounty":"70","county":"DeSoto"},{"idcounty":"71","county":"IndianRiver"},{"idcounty":"72","county":"SantaRosa"},{"idcounty":"75","county":"St Johns"},{"idcounty":"77","county":"St Lucie"},{"idcounty":"78","county":"Dixie"},{"idcounty":"80","county":"Suwannee"},{"idcounty":"81","county":"Marion"}]})
  </code></pre>