popup menu appears on scroll bar when right clicked on scroll bar

[jpn]

scrollArea->horizontalScrollBar()->setContextMenuPolicy(Qt::NoContextMenu);
scrollArea->verticalScrollBar()->setContextMenuPolicy(Qt::NoContextMenu);

scrollArea->horizontalScrollBar()->setContextMenuPolicy(Qt::NoContextMenu);
scrollArea->verticalScrollBar()->setContextMenuPolicy(Qt::NoContextMenu);

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