move window to center before show

Yuhang Zhao

2023-12-06 dfc3457cabeb57be46228816127ee32abf609853

 src/core/contexts/win32windowcontext_p.h

@@ -45,6 +45,8 @@
        // Whether the last mouse leave message is blocked, mainly for handling the unexpected
        // WM_MOUSELEAVE.
        bool mouseLeaveBlocked = false;

        bool centered = false;
    };

}