Display the breadcrumb all the time (even when on non-existing page)

Example use case:

• You're on an existing page such as http://localhost:8080/xwiki/bin/view/Sandbox/NewPage/YetAnotherPage/
• You click in the breadcrumb on "NewPage" that doesn't exist.
• You get to see the attached screenshot but you don't see where you are in the hierarchy anymore!