MAGETWO-81926: Category hierarchy isn't updated on Product Admin page

Author: svitja

app/code/Magento/Catalog/Controller/Adminhtml/Category/RefreshPath.php

@@ -41,7 +41,7 @@ public function execute()
             return $resultJson->setData([
                 'id' => $categoryId,
                 'path' => $category->getPath(),
-                'parentid' => $category->getParentID(),
+                'parentId' => $category->getParentID(),
             ]);
         }
     }

app/code/Magento/Catalog/view/adminhtml/web/catalog/category/form.js

@@ -46,7 +46,7 @@ define([
                 } else {
                     $(this.options.categoryIdSelector).val(data.id).change();
                     $(this.options.categoryPathSelector).val(data.path).change();
-                    $(this.options.categoryParentSelector).val(data.parentid).change();
+                    $(this.options.categoryParentSelector).val(data.parentId).change();
                 }
             }
         };