backend/wordpress/wp-includes/js/wpdialog.min.js

!function(a){a.widget("wp.wpdialog",a.ui.dialog,{open:function(){this.isOpen()||!1===this._trigger("beforeOpen")||(this._super(),this.element.focus(),this._trigger("refresh"))}}),a.wp.wpdialog.prototype.options.closeOnEscape=!1}(jQuery);