Fix window visibility inconsistency

Sine Striker

2023-12-26 1740ed5e0e765ebd8676733243eb3eaa81f95df1

 src/core/windowagentbase.h

@@ -24,7 +24,6 @@
            Minimize,
            Maximize,
            Close,
            NumSystemButton,
        };
        Q_ENUM(SystemButton)