title: Cannot set property 'view' of undefined Extjs4
body: <p>I trying to update code from extjs2 to extjs4, but I have an error and something wrong with <code>grid</code>. </p>
  
  <pre><code>var grid = new App.grid.GridPanel({
      store: store,
      columns: gridColumns,
      frame: false,
    //autoExpandColumn: 'name',
      autoHeight: true,
      loadMask: true,
      bbar: pagingBar,
      viewConfig: {
          stripeRows: true,
          scrollOffset: 2,
          grid: {
              isTree: false
          }
      }
  });
  </code></pre>
  
  <p>I had a problem with 'isTree' property before, so, I added this property that would move on, but now, Google Chrome return error in ext-all.debug.js 102947 line::</p>
  
  <pre><code> me.selModel.view = me;
  </code></pre>