Content type "product" created by Ubercart doesn't appear at admin/store/products/classes (Manage classes)

Right, it's supposed to be a blank product. If you want another product type with default attributes and options, that's what classes are for. A lot of people simply don't need that, so a blank product is enough. We won't be changing that this late in the game and expect products to change in UC 3.x, so I'm going to close this as "by design."

This patch changes the menu definitions to display the tab "Manage Classes" in product admin settings.