title: Using Multi select grid sencha ext js 4.1
body: <p>I am new to Sencha. In one of my projects I have to use a Multiselect Grid Panel and update the store to and from the Grid. I have no clue as to how to achieve this. 
  I will highly appreciate if someone can send me their sample code or even links that display the usage of Multiselect grids. I found a few but unfortunately those links dont use Ext JS 4.1. </p>
  
  <p>Thanks guys</p>