message: Use WindowText color for custom painting on RDSplitterHandle
diff: @@ -65,8 +65,9 @@ bool RDSplitterHandle::collapsed() const
  void RDSplitterHandle::paintEvent(QPaintEvent *event)
  {
  QPainter painter(this);
  - painter.setPen(Qt::black);
  - painter.setBrush(Qt::SolidPattern);
  + QColor col = palette().color(QPalette::WindowText);
  + painter.setPen(col);
  + painter.setBrush(QBrush(col));
  int w = width();
  int h = height();
  