title: How to change Icon image of QAction when press QToolButton
body: <ol>
  <li><p>I want to remove border of QToolButton when mouse hover.
  <a href="https://i.stack.imgur.com/ndGDE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ndGDE.png" alt="enter image description here"></a></p></li>
  <li><p>I want to change icon image of QAction when press QToolButton.
  <a href="https://i.stack.imgur.com/94FqU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/94FqU.png" alt="enter image description here"></a></p></li>
  </ol>
  
  <p>i changed stylesheet for QToolButton but it is not working, please help</p>
  
  <hr>
  
  <ol>
  <li>I want to remove border of QToolButton when mouse hover.
  I changed stylesheet for QToolButton</li>
  </ol>
  
  <blockquote>
    <p>QToolButton:hover{
            border: none;
        }<br>
        QToolButton:pressed{
            border: none;
        }</p>
  </blockquote>
  
  <p>but it display border bottom and button move to left like image</p>
  
  <p><a href="https://i.stack.imgur.com/ZUBMr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZUBMr.png" alt="enter image description here"></a></p>