message: Account for rootIsDecorated when painting tree lines in RDTreeView
diff: @@ -569,7 +569,8 @@ void RDTreeView::drawBranches(QPainter *painter, const QRect &rect, const QModel
  // fill in the background behind the lines for the whole row, since by default it doesn't show up
  // behind the tree lines.
  - QRect allLinesRect(rect.left(), rect.top(), (parents.count() + 1) * indentation(), rect.height());
  + QRect allLinesRect(rect.left(), rect.top(),
  + (parents.count() + (rootIsDecorated() ? 1 : 0)) * indentation(), rect.height());
  QStyleOptionViewItem opt;
  opt.initFrom(this);
  