title: ExtJs - Edit Grid cell by click on respective image in row
body: <p>I am using <code>Ext.grid.Panel</code>. Now my requirement is I want to Edit particular cell by click image/button from each row which actioncolumn(xtype) and not in click on cell, </p>
  
  <p>I have tried this by using rowEditing plugin but I don't want update and cancel button when cell is editing. Can I edit 2 or 3 cell out of 6 cell in grid row by clicking button / image in each row?</p>