Fix bug of window closing and reshowing

Sine Striker

2024-02-23 6c0043c1e3d97398828fbd56448f1cd8ee201e66

 examples/mainwindow/CMakeLists.txt

@@ -3,7 +3,12 @@
file(GLOB _src *.h *.cpp)

qwk_add_example(${PROJECT_NAME}
    SOURCES ${_src}
    QT_LINKS Core Gui Widgets
    SOURCES ${_src} mainwindow.qrc ../shared/resources/shared.qrc
    QT_LINKS Core Gui Widgets # WebEngineWidgets
    LINKS QWKWidgets WidgetFrame
)
)

set_target_properties(${PROJECT_NAME} PROPERTIES
    CXX_STANDARD 17
    CXX_STANDARD_REQUIRED TRUE
)