title: extjs grid restore columns (hide / show) ,width,postion
body: <p>I want to reset the grid columns (hide / show) ,width,postions without reload the page .
  I am trying this </p>
  
  <pre><code>Ext.getCmp('inventoryResultGrid').applyState(firstState);
  </code></pre>
  
  <p>but it only working for positions.</p>