@if $theme-name == 'theme-classic' or $theme-name == 'theme-gray' {
    .file-uploads-image-add {
        background-image: url(images/image_add.png);
    }
} @else {
    .file-uploads-image-add:before {
        font: 16px/1 FontAwesome;
        content: $fa-var-file-image-o;
    }
}