change "/" into a subpage arrow (breadcrumbs in wiki urls) (BB-838)

Issue #2010 invalid
Nicholas Tung
created an issue

On most pages, one gets an e.g. "Home -> Development" header. It would be nice if this could be extended to "Home -> Development -> MyClassDetails" kind of scheme, so the user could click "Development" in the header, and return to that page. It seems "/" is the most natural separator.

Example page:

thanks, Nicholas