QComboBox should respect the selection behaviour of the view

QComboBox::showPopup calls view().selectionModel().setCurrentIndex(d.currentIndex,. this ignores the selection behaviour set on the view.

An example can be found here: https://forum.qt.io/topic/95908/qcombobox-with-qtableview-selection-or-focus-problem-when-combobox-items-pop-up