It looks this css class got named based on web-order sample, instead of having a more generic name..

Code:
.WebIcon_FindSalesP:before,
.WebIcon_FindSalesP button:before,
button.WebIcon_FindSalesP:before,
.WebIcon_FindSalesP>div>span.WebItm_Icon:before {
    /* Find icon */
    content: "\e00c";
}