extjs-gpl/build/examples/classic/restful/restful.css

GPL licensed version of Sencha Ext JS

.icon-user {
    background-image: url(images/user.png) !important;
}

.icon-add {
    background-image: url(images/add.png) !important;
}

.icon-delete {
    background-image: url(images/delete.png) !important;
}