tst_QItemDelegate::comboBox() is flaky because sometimes the used
QTableWidget does not yet have the focus which prevents a correct
editing. Fix it by explictily setting the focus on the widget after it
is shown.
A similar fix was added for dateTimeEditor() in
9822d57d85.
With this patch the test no longer fails for my on opensuse, therefore
remove the blacklisting.
Task-number: QTBUG-67282
Change-Id: I907db662ca347f8e8d31e5be215a100377b159ca
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Kari Oikarinen <kari.oikarinen@qt.io>