Hi there
I really think this depends on specific theme integration
We’ll correct that on Proteo theme, of course, since it is our product; on the other hand, regarding your specific site, I suggest you to add the following CSS rules to Additional CSS section of theme customizer (WP Dashboard -> Appearance -> Customize)
.product .summary .yith-wcwl-add-to-wishlist .yith-wcwl-add-button a {
padding: 0!important;
font-size: 0!important;
}
.product .summary .yith-wcwl-add-to-wishlist .yith-wcwl-add-button i {
font-size: 14px!important;
}
.product .summary .yith-wcwl-add-to-wishlist .yith-wcwl-add-button a.delete_item i {
font-family: 'ElegantIcons';
display: inline-block!important;
top: 50%;
left: 50%;
position: absolute;
-webkit-transform: translate(-50%, -50%);
-ms-transform: translate(-50%, -50%);
-moz-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
}
.product .summary .yith-wcwl-add-to-wishlist .yith-wcwl-add-button a.delete_item i:before{
content: "\e089";
}
Here a couple of screenshots with this custom style
Add to wishlist
Added to wishlist
Hope this helps