Wrong direction of QToolBar extension button icon when RTL interface used

#include <QApplication>
#include <QWidget>
#include <QVBoxLayout>
#include <QCheckBox>
#include <QToolBar>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    // Setup window layout

    QWidget widget;
    widget.setFixedWidth(50);
    QVBoxLayout layout;
    QCheckBox chkRtl("RTL interface");
    QToolBar toolBar;
    widget.setLayout(&layout);
    layout.addWidget(&chkRtl);
    layout.addWidget(&toolBar);
    widget.show();

    // Setup rtl checkbox

    QObject::connect(&chkRtl, &QCheckBox::stateChanged, [=](int state) {
        Qt::LayoutDirection dir = Qt::LeftToRight;
        if (state == Qt::Checked)
            dir = Qt::RightToLeft;
        QApplication::setLayoutDirection(dir);
    });

    // Setup toolbar

    toolBar.addAction("New");
    toolBar.addAction("Open");
    toolBar.addAction("Close");
    toolBar.addAction("Quit");


    return a.exec();
}