site.xml

<?xml version="1.0" encoding="UTF-8"?>
<site>

    <types>
        <type type="types/simpleCheckout" icon="fa fa-shopping-cart ">
            <locale group="quiqqer/order-simple-checkout" var="admin.types.simpleCheckout"/>
            <desc>
                <locale group="quiqqer/order-simple-checkout" var="admin.types.simpleCheckout.desc"/>
            </desc>
        </type>
    </types>

</site>