QGraphicsWidget::setPreferredSize() does not override constraint

QGraphicsWidget::setPreferredSize() does not override constraint

Previous behaviour:
widget->setPreferredSize(100,100);
widget->sizeHint(Qt::PreferredSize, QSizeF(50,-1));
// returns (50,100);

New behaviour:
widget->setPreferredSize(100,100);
widget->sizeHint(Qt::PreferredSize, QSizeF(50,-1));
// returns (50,(whatever the sizeHint says));