title: Can I change custom dynamic properties from a stylesheet (qss)?
body: <p>I have a custom <code>QFrame</code>like this</p>
  
  <pre><code>//! Widget which displays a audio level meter, indicating the
  //! level and peak levels of the window of audio samples most recently analyzed
  class BLACKGUI_EXPORT CLevelMeter : public QFrame
  {
      Q_OBJECT
      Q_PROPERTY(QColor lowColor  READ getLowColor  WRITE setLowColor)
      Q_PROPERTY(QColor highColor READ getHighColor WRITE setHighColor)
      Q_PROPERTY(QColor peakColor READ getPeakColor WRITE setPeakColor)
  </code></pre>
  
  <p>I want to set those colors in an <code>qss</code> stylesheet like this</p>
  
  <pre><code>BlackGui--CLevelMeter {
    lowColor: blue;
    border: 1px solid grey;
    border-radius: 5px;
  </code></pre>
  
  <p>This does NOT work, any chance to do this?</p>