Neither Qt::ToolTip nor Qt::Popup are single bits in Qt::WindowFlags, and do in fact include Qt::Window. This meant that when we or'ed them and did a bitwise and with QWindow::type(), we would match more types than just Qt::Popup and Qt::ToolTip. We would for instance get any Qt::Window as well, which meant the main window would be added to activePopups, leading to strange things happening, such as crashes and the main window closing unexpectedly. [ChangeLog][QPA plugin] Fixed a crash when closing multiple popups at once. Fixes: QTBUG-76124 Change-Id: I1a6a59e161a436604a7ac8ab824396481dc99a20 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io> (cherry picked from commit 4a9a5e2f62935488b1eeb06cd5d69a168a5a9308)
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