title: Does grid.reconfigure removes all existing function/event handlers present in columns and create new table?
body: <p>Does grid.reconfigure removes all existing function/event handlers present in the columns and create a new table?</p>
  
  <p>I have tried both </p>
  
  <pre><code> grid.reconfigure([
  </code></pre>
  
  <p>and</p>
  
  <pre><code>Ext.define('GridStore', {
  </code></pre>
  
  <p>but existing event handlers are gone.</p>
  
  <p>What is the best solution to change the below view:</p>
  
  <p><a href="https://i.stack.imgur.com/KIPB6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KIPB6.png" alt="enter image description here"></a></p>
  
  <p>TO this view:
  <a href="https://i.stack.imgur.com/ngW7p.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ngW7p.png" alt="enter image description here"></a></p>