Ultimenu menu links don't have active-trail class

Here is a quick-fix module that I created that adds the active-trail using a function from the menu block module.

Here is a patch that fixes the issue the same way menu_block does. In fact, I literally copied and renamed the function from menu_block that they use to add the active-trail data to the $tree data.

Active trail is useful when you have two menus -- a primary and a secondary. For example, let's say your main menu has a "Products" option which is an ultimenu with several products listed. If you pick an option from the ultimenu, let's say "Toothpaste", it takes you to the toothpaste page. The toothpaste page shows the main menu with the Product option as well as a secondary menu that has all of the products listed: toothpaste, shampoo, sunscreen, etc.

In this scenario, the "Toothpaste" option from the secondary menu is the active page and will have an "active" class. However, you may want to style the "Products" option on the main menu to indicate you are in the products section of the site. Products is not active, so it won't have the "active" class. Since Toothpaste is a child menu item of Products, it is part of the menu trail for the current page. That is what the "active-trial" class is for. This patch will ensure that an ultimenu that is a parent menu item to the current page has the active-trail class.