title: QTableWidget don't change style sheet after run application
body: <p>I have some problem with style in Qt Creator. 
  I added some style to QTableWidget and I noted difference after that in IDE.</p>
  
  <pre><code>QScrollBar:vertical {
       background: #fd966e;
  }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/epW2p.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/epW2p.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/epW2p.png" rel="nofollow noreferrer">beforeRunApplication</a></p>
  
  <p>When I run my application style not loading to my Widget and I see this view.
  <a href="https://i.stack.imgur.com/yPEl4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yPEl4.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/yPEl4.png" rel="nofollow noreferrer">afterRunApplication</a></p>
  
  <p>What I am doing wrong ? Please help me.</p>