#wp-admin-bar-mo-queue-indicator .ab-icon {
    font-family: dashicons;
    display: inline-block;
}

#wp-admin-bar-mo-queue-indicator .mo-spinner-icon:before {
    content: "\f463";
    top: 2px;
    animation: mo-queue-spin 1.5s linear infinite;
}

@keyframes mo-queue-spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}