title: How can I set background for a QPushButton's tooltip?
body: <p>In Qt I set a background image for a QPushButton, then I added a tooltip for this button and the tooltip has the same background image as the button and I couldn't change it with stylesheet, what am I missing?</p>
  
  <p>In my code I have:</p>
  
  <pre><code>button-&gt;setStyleSheet("background-image: url(pathToImage);");
  button-&gt;setToolTip("Click here");
  </code></pre>
  
  <p>In my style.qss I have:</p>
  
  <pre><code>QToolTip{
      background-image: none;
      background-color: white;
      font-size: 20px;
      border: 1px solid black;
  }
  </code></pre>
  
  <p>The font-size and the border works, but the tooltip's background-image is the same as the button's.
  I also tried adding another background-image to the tooltip, it didn't worked either.</p>
  
  <p>How can I change the tooltip's background?</p>