title: krajee bootstrap file input disable/remove upload icon preview thumbnail
body: <p>I need to disable upload button. It's possible?</p>
  
  <p><a href="https://i.stack.imgur.com/Wbggt.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/Wbggt.jpg" alt="enter image description here"></a></p>