Finish customize system button pos for QtWidgets

SineStriker

2023-12-27 2f2ee6571e9ce784db0488ade60816f09bd7448c

 src/core/contexts/win32windowcontext_p.h

@@ -69,7 +69,7 @@
        // WM_MOUSELEAVE.
        bool mouseLeaveBlocked = false;

        bool centered = false;
        bool initialCentered = false;
    };

}