tst_QGraphicsWidget::updateFocusChainWhenChildDie fails on QNX

Test is run at QNX QEMU in the CI with offscreen plugin and software rendering.

1: QWARN  : tst_QGraphicsWidget::updateFocusChainWhenChildDie() This plugin does not support propagateSizeHints()
1: QWARN  : tst_QGraphicsWidget::updateFocusChainWhenChildDie() Mouse event "MousePress" not accepted by receiving widget
1: FAIL!  : tst_QGraphicsWidget::updateFocusChainWhenChildDie() Compared QObject pointers are not the same
1:    Actual   ((((static_cast<QApplication *>(QCoreApplication::instance()))->activeWindow()))): <null>
1:    Expected (static_cast<QWidget *>(&view))                                                  : QGraphicsView/4b805cfd30