MC-3309: Build stabilization

Prevent calling _setActive multiple times on active modal

Author: danmooney2

app/code/Magento/Ui/view/base/web/js/modal/modal.js

@@ -340,6 +340,12 @@ define([
             var zIndex = this.modal.zIndex(),
                 baseIndex = zIndex + this._getVisibleCount();
 
+            if (this.modal.data('active')) {
+                return;
+            }
+
+            this.modal.data('active', true);
+
             this.overlay.zIndex(++baseIndex);
             this.prevOverlayIndex = this.overlay.zIndex();
             this.modal.zIndex(this.overlay.zIndex() + 1);
@@ -354,6 +360,7 @@ define([
          */
         _unsetActive: function () {
             this.modal.removeAttr('style');
+            this.modal.data('active', false);
 
             if (this.overlay) {
                 // In cases when one modal is closed but there is another modal open (e.g. admin notifications)