Prompt to save changes after pasting items into Nested Content

src/Umbraco.Web.UI.Client/src/views/propertyeditors/nestedcontent/nestedcontent.controller.js

@@ -356,6 +356,7 @@ angular.module("umbraco").controller("Umbraco.PropertyEditors.NestedContent.Prop
             newNode.key = String.CreateGuid();
             
             $scope.nodes.push(newNode);
+            $scope.setDirty();
             //updateModel();// done by setting current node...
             
             $scope.currentNode = newNode;