.menu .check {
    background-image: url("assets/check-menuitem-unselected.png");
}

.menu .radio {
    background-image: url("assets/check-menuitem-unselected.png");
}

.menu .check:active {
    background-image: url("assets/check-menuitem-dark.png");
}

.menu .radio:active {
    background-image: url("assets/radio-menuitem-dark.png");
}
