 QPushButton{
    border: none;
    background-color: rgba(139,139,139, 100);
    min-height: 32px;
    max-height: 32px;
    min-width: 32px;
    max-width: 32px;
    border-radius: 16px;;
}
QPushButton#buttonClose{
    image: url(":/assets/button/quit.png");
}
QPushButton#buttonSettings{
    image: url(":/assets/button/setting.png");
}

QPushButton#buttonClose:hover{
    background-color: rgba(139,139,139, 200);
}
QPushButton#buttonSettings:hover{
    background-color: rgba(139,139,139, 200);
}