SSPanel-Uim/public/theme/material/assets/js/modal.js

// modale dialog vertical alignment
	$(function () {
		'use strict';

		$(document).on('hidden.bs.modal', '.modal-va-middle', function () {
			$(this).removeClass('modal-va-middle-show');
		});

		$(document).on('show.bs.modal', '.modal-va-middle', function () {
			$(this).addClass('modal-va-middle-show');
		});
	});