div.dxpopup {
    overflow-y: auto;
    bottom:auto;
    right:auto;
}

div.dxpopup > div.modal-content > div.modal-header {
    height: 40px;
    padding: 5px 5px 10px 5px;
}
div.dxpopup > div.modal-content > div.modal-header > button.close {
    font-size: 20px !important;
    font-weight: bold !important;
    color: #777 !important;
    opacity: 0.7;
}

div.dxpopup > div.modal-content > div.modal-body > div.modal-footer {
    padding: 5px;
}