div.label {
    position: relative;
}

div.label span.visibility {
    width: 16px;
    height: 24px;
    display: block;
    position: absolute;
    right: 0;
    top: 0;
    cursor: pointer;
    text-align: center;
}

div.label span.visibility::after {
    font-family: 'FontAwesome';
    font-size: 16px;
    line-height: 24px;
    content: "\f06e";
}

div.label span.visibility:hover::after {
    color: #0073aa;
    content: "\f070";
}

div.label span.visibility.disabled::after {
    opacity: 0.5;
    content: "\f070";
}

div.label span.visibility.disabled:hover::after {
    color: #0073aa;
    content: "\f06e";
}