QHeaderViewPrivate reimplemented _q_layoutChanged() to handle changes
of rows/columns via layoutChanged/layoutAboutToBeChanged. This worked
fine for Qt4 but since Qt5 only the special signals rowsAboutToBeMoved/
rowsMoved are used for this (8021e2d5e7).
With this change, QAbstractItemViewPrivate::_q_rows/columnsMoved() is
calling the virtual function _q_layoutChanged(). This resulted in a
wrong call of QHP::_q_layoutChanged() for a horizontal header when
a row changed and for a vertical header during a column change. In the
end this can lead to an unhide of hidden sections.
Task-number: QTBUG-54610
Change-Id: Ide4bfc5b24a97746fd1e5af82d3ba08257149157
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
a02b371eb2