optimize mac context a bit

Yuhang Zhao

2023-12-18 56c4ef0a85abb92a64bb90d86526f2218835e282

 src/core/contexts/cocoawindowcontext_p.h

@@ -19,6 +19,8 @@

    protected:
        WId windowId = 0;

        std::unique_ptr<QObject> cocoaWindowEventFilter;
    };

}