Add notification observer on Mac

SineStriker

2023-12-27 88b5b56b6a67d93208eae3980af2f30da09dd8ae

 src/core/contexts/cocoawindowcontext_p.h

@@ -31,7 +31,7 @@
    protected:
        WId windowId = 0;

        std::unique_ptr<QObject> cocoaWindowEventFilter;
        std::unique_ptr<SharedEventFilter> cocoaWindowEventFilter;
    };

}