ul.thumbnails.image_picker_selector {
    overflow: auto;
    list-style-image: none;
    list-style-position: outside;
    list-style-type: none;
    padding: 0px;
    margin: 0px;
    display: inline-block;
    width:100%;
}
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 {
    float: left; 
    width:33.3%;
    padding: 0 5px;
    margin-bottom:20px;
    text-align: center;
}
ul.thumbnails.image_picker_selector li .thumbnail {
    position:relative;
    padding: 6px;
    border: 1px solid #dddddd;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none; 
    cursor: pointer;
    margin-bottom:0px;
}
ul.thumbnails.image_picker_selector li .upload-image img {
    display: block;
    width: 100%;
    height: auto;
    margin-left: auto;
    margin-right: auto;
    cursor: pointer;
}
ul.thumbnails.image_picker_selector li .upload-image label, ul.thumbnails.image_picker_selector li .upload-image form {
    margin-bottom:0;
}
ul.thumbnails.image_picker_selector li .upload-image input {
    display:none;
}
ul.thumbnails.image_picker_selector li .thumbnail img {
    -webkit-user-drag: none;
    width: 100%;
    height: auto;
    object-fit: cover
}
    ul.thumbnails.image_picker_selector li .thumbnail.selected {
      background: #0088cc; }