cover new behavior with unit tests, static test fix

Author: Nazar65

dev/tests/js/jasmine/tests/app/code/Magento/Ui/base/js/form/element/image-uploader.test.js

@@ -78,7 +78,10 @@ define([
                         '?isAjax=true&current_tree_path=d3lzaXd5Zw,,',
                     null,
                     null,
-                    'Hello world'
+                    'Hello world',
+                    {
+                        targetElementId: 'theTargetId'
+                    }
                 );
             });
         });

dev/tests/js/jasmine/tests/lib/mage/browser.test.js

@@ -37,6 +37,7 @@ define([
                          */
                         done: function () {
                             obj.targetElementId = 1;
+                            obj.modalLoaded = true;
                         }
                     };
                 });
@@ -58,8 +59,8 @@ define([
                         }
                     };
                 });
-            obj.openDialog('instance/url', 100, 100, 'title', undefined);
-            obj.openDialog('instance/url', 100, 100, 'title', undefined);
+            obj.openDialog('instance/url/target_element_id/YDW2424/', 100, 100, 'title', undefined);
+            obj.openDialog('instance/target_element_id/Y45GDRg/', 100, 100, 'title', undefined);
             expect($.ajax.calls.count()).toBe(1);
         });
     });

lib/web/mage/adminhtml/browser.js

@@ -56,7 +56,7 @@ define([
 
             if (this.modalLoaded) {
 
-                if (typeof options.closed !== 'undefined') {
+                if (!_.isUndefined(options)) {
                     this.modal.modal('option', 'closed', options.closed);
                 }
 
@@ -322,16 +322,18 @@ define([
          * return {HTMLElement|null}
          */
         getTargetElement: function () {
-            var opener, targetElementId;
+            var opener,
+                targetElementId,
+                mediaBrowser = window.MediabrowserUtility;
 
-            if (!_.isUndefined(wysiwyg) && wysiwyg.get(window.MediabrowserUtility.targetElementId)) {
+            if (!_.isUndefined(wysiwyg) && wysiwyg.get(mediaBrowser.targetElementId)) {
                 opener = this.getMediaBrowserOpener() || window;
-                targetElementId = tinyMceEditors.get(window.MediabrowserUtility.targetElementId).getMediaBrowserTargetElementId();
+                targetElementId = tinyMceEditors.get(mediaBrowser.targetElementId).getMediaBrowserTargetElementId();
 
                 return $(opener.document.getElementById(targetElementId));
             }
 
-            return $('#' + window.MediabrowserUtility.targetElementId);
+            return $('#' + mediaBrowser.targetElementId);
         },
 
         /**