title: Search is not working with filter toolbar in JQGrid
body: <p>I am facing issue while loaidng the data in JQGrid at a later stage in place of at the time of ceating grid. I am using filter toolbar for search. </p>
  
  <p>following is the code I am using:
  <p><b>Creating Grid</b></p>
  
  <pre>
  jQuery("#list").jqGrid({
              datatype: 'local',
              colNames: [my col names],
              colModel: [my col model],
               jsonReader: {
                  root: "rows",
                  page: "page",
                  total: "total",
                  //records: "records",
                  repeatitems: false
              },
              height: 300,
              viewrecords: true,
              gridComplete: this.onGridComplete,
              ondblClickRow: this.rowDblClick,
              onSelectRow: this.selectRow,
              headertitles: false,
              loadtext: "Loading...",
              sortable: true,
              altRows: true,
              loadonce: true,
              rowNum: 100,
              pager: '#pager',
              root: "rows",
              rowList: [100, 200, 300],
              pagination: true,
              ignoreCase: true 
          })
  </pre>
  
  <p><p><b>Load data at later stage </b></p>
  
  <pre>
  if(gridDataStr != "none") // gridDatStr has data 
          {
              grid.initialize(); // create the grid
              var myjsongrid = JSON.parse(gridDataStr);            
              grid.table[0].addJSONData(myjsongrid);  
              grid.table.jqGrid('setGridParam',{datatype:'json', data:myjsongrid}).trigger('reloadGrid');          
              if (myjsongrid["rows"].length > 1) 
              {
                  grid.table.filterToolbar({
                      stringResult: true,
                      searchOnEnter: false
                      });
              }
          }
  </pre>
  
  <p>However if I load the same data at the time of creating the grid with datatype:json and using some valid url, searching is working well. </p>
  
  <p>Any suggestions?</p>