EditorGridPanel 增加、删除空白行

红色为关键代码   

varinsur_typesSM = new Ext.grid.CheckboxSelectionModel({singleSelect:false});
    
    varMyRecord =Ext.data.Record.create([  
             {name:'id',type:'Number'},  
             {name:'name',type:'String'},  
             {name:'name',type:'String'}  
         ]);  
     vareditorGridStore = newExt.data.JsonStore(  
                   {  
                      fields : [  
                           'id','name','desc' 
                       ]
                   }  
               );  
    varinsur_typesCM = new Ext.grid.ColumnModel([
     insur_typesSM,
     {header:'津贴种类',dataIndex:'medType',sortable:true,width:80,id:'expand',align:'center'},
     {header:'金额',dataIndex:'employeeName',sortable:true,width:80,align:'center'},
     {header:'备注',dataIndex:'idNumber',sortable:true,align:'center',menuDisabled:true}
    ]);
    
    vareditorGrid = new Ext.grid.EditorGridPanel({
     id:'editorGrid',
     title:"津贴明细",
     height:252,
     width:669,
     store:editorGridStore,
          cm: insur_typesCM,
          sm: insur_typesSM,
          autoExpandColumn:'expand',clicksToEdit:1,
          columnLines: true,
          loadMask: {msg:'正在加载数据，请稍侯……'},
     tbar:[{
           text:'增加',
           iconCls:'as_add',
           scale:'large',
           handler :function(){  
                           var newRow = newMyRecord(  
                                {  
                                    id:'',  
                                    name:'',  
                                    desc:'' 
                               }  
                           );  
                           editorGrid.stopEditing();  
                           editorGridStore.insert(0,newRow),  
                           editorGrid.startEditing(0,0);  
                       }  
          },{
           text:'删除',
           scale: 'large',
           iconCls:'as_delete',
           handler: function(){
            if(insur_typesSM.getSelections().length< 1 ){
        Ext.example.msg('系统提示','请至少选择一条数据');
        return;
       }
 Ext.MessageBox.warningConfirm('确认操作','<spanstyle="font-size:16px;color:#ff0000">警告</span>:该操作将会删除选中的缴费险种及其相关信息，且操作无法恢复。<br/><br/>确定要继续吗？',function(v){
                if(v=='yes'){
                 
                 varrecs = editorGrid.getSelectionModel().getSelections();
                 if(recs){
                  for(vari=0; i<recs.length;i++){
                   
                   Ext.getCmp('editorGrid').getStore().remove(recs[i]);
                  }
                 }
         Ext.getCmp('editorGrid').getView().refresh();
                }
               },this);
              }
          }],
     listeners:{
      afterEdit:function(e){
       
      }
     }
    });