ul.thumbnails.image_picker_selector {
     overflow: auto;
     list-style-image: none;
     list-style-position: outside;
     list-style-type: none;
     padding: 0px;
     margin: 0px;
}
 ul.thumbnails.image_picker_selector ul {
     overflow: auto;
     list-style-image: none;
     list-style-position: outside;
     list-style-type: none;
     padding: 0px;
     margin: 0px;
}
 ul.thumbnails.image_picker_selector li.group {
    width:100%;
}
 ul.thumbnails.image_picker_selector li.group_title {
     float: none;
}
 ul.thumbnails.image_picker_selector li {
     margin: 0px;
     float: left;
     width: 25%;
}
 ul.thumbnails.image_picker_selector li .thumbnail {
     padding: 4px;
     border: 1px solid #dddddd;
     -webkit-user-select: none;
     -moz-user-select: none;
     -ms-user-select: none;
}
 ul.thumbnails.image_picker_selector li .thumbnail img {
     -webkit-user-drag: none;
     width: 100% 
}
 ul.thumbnails.image_picker_selector li .thumbnail.selected {
     background: #e03e54;
}
 ul.thumbnails .thumbnail{
     margin-bottom: 0;
}