title: ExtJS Modern -- add button to grid cell
body: <p>I have an ExtJS 6.2 modern app. What is the proper way to add a button to a grid cell? </p>
  
  <p>I tried using the column renderer fn to return a button but I just see the HTML tags rendered, not the actual element. I also tried using the "widgetcell" component which does render the button but not the button text.</p>
  
  <p><a href="https://fiddle.sencha.com/#view/editor&amp;fiddle/2ri6" rel="nofollow noreferrer">Fiddle.</a></p>