AC-2066: User account menu is active same time while window popup is displaying

Author: krissyhiserote

app/code/Magento/Sales/view/adminhtml/web/order/create/giftmessage.js

@@ -207,6 +207,7 @@ define([
                         'margin-top' : topMargin,
                         'z-index': 1000
                     });
+                    jQuery(this).closest('.ui-dialog').nextAll('.ui-widget-overlay').css('z-index', 999);
                 },
                 close: function () {
                     jQuery(this).closest('.ui-dialog').removeClass('ui-dialog-active');