Add flash notice after successful query_menu_items#create

app/controllers/query_menu_items_controller.rb

@@ -32,7 +32,11 @@ class QueryMenuItemsController < ApplicationController
 
 	def create
 		@query_menu_item = MenuItems::QueryMenuItem.find_or_initialize_by_name_and_navigatable_id normalized_query_name, @query.id, title: @query.name
-		flash[:error] = l(:error_menu_item_not_created) unless @query_menu_item.save
+		if @query_menu_item.save
+			flash[:notice] = l(:notice_successful_create)
+		else
+			flash[:error] = l(:error_menu_item_not_created)
+		end
 
 		redirect_to query_path
 	end

features/menu_items/query_menu_items.feature

@@ -59,6 +59,7 @@ Feature: Query menu items
     And I click on "More functions"
     And I click on "Add menu item"
     Then I should see "Bugs" within "#main-menu"
+    And I should see "Successful creation."
 
     @javascript
   Scenario: Delete a query menu item