ul.thumbnails.image_picker_selector {
    overflow: auto;
    list-style: none;
    /*list-style-image: none;
    list-style-position: outside;
    list-style-type: none;*/
    padding: 0;
    margin: 0;
}

    ul.thumbnails.image_picker_selector ul {
        overflow: auto;
        list-style: none;
        /*list-style-image: none;
        list-style-position: outside;
        list-style-type: none;*/
        padding: 0;
        margin: 0;
    }

    ul.thumbnails.image_picker_selector li.group_title {
        float: none;
    }

    ul.thumbnails.image_picker_selector li {
        margin: 0 12px 12px 0;
        display: inline-block;
    }

        ul.thumbnails.image_picker_selector li .thumbnail {
            padding: 6px;
            border: 1px solid #dddddd;
            -webkit-user-select: none;
            -moz-user-select: none;
            -ms-user-select: none;
            user-select: none;
        }

            ul.thumbnails.image_picker_selector li .thumbnail img {
                -webkit-user-drag: none;
            }

            ul.thumbnails.image_picker_selector li .thumbnail.selected {
                background: #0088cc;
            }