title: codemirror-textarea resizable like a standard textarea
body: <p>Does anybody know how to make a codemirror textarea resizable like text-area ?</p>
  
  <p>So that the codemirror textarea can be resized by dragging their bottom down grabber corner.</p>
  
  <p>I know it's possible for html divs (see <a href="https://stackoverflow.com/questions/11163981/div-resizable-like-text-area">div resizable like text-area</a>) but I have not managed to achieve the same thing on code mirror.</p>