Major Description
Create framework-level support for context menus by creating a Component.ContextMenuHandler interface. When the display host detects a right click, it will:
1) Get a reference to the lowest-level component that the mouse is over, and if that's non-null...
2) Construct the path from the display to that component, instantiate a MenuPopup
3) Walk the path, passing the menu popup's menu to each ContextMenuHandler that is found along the path
4) Open the menu popup if the menu is non-empty after the path has been walked