When the first column is hidden or not visible in the current viewport,
it is not possible to deselect the current row.
Fix it by passing the correct column to
QItemSelectionModel::selectedRows() when testing if the current index is
selected.
Fixes: QTBUG-79092
Change-Id: I9d8082d2b29ad2f799156aee910c6ff6e3217771
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
5edf34848a