Feature Request: QTabWidget::setCornerWidget to work with East and West position

Qt Documentation says that for TabPosition as East and West, corner Widget does not work properly, Like for the following code, pushButton is not shown for east and west postions:

  QPushButton *button = new QPushButton("AddPage",this);
  button->setGeometry(0,0,120,20);
  tabWidget->setTabPosition(QTabWidget::West);
  tabWidget->setCornerWidget(button,Qt::TopLeftCorner);

It would be nice if setCornerWidget can work with all tab postions.