tweak/bottom_breadcrumb

Breadcrumbs at the bottom of the thread page too.

Requested by kalajel

It's nifty, I like it too. Must be my old-school forum origins.

There's something nice about member requested changes that take seconds to implement.

Including a note about the 'estimated amount of effort (1 to 10?) to implement' may help people 'vote'. We see a lot of '..don't want you wasting time on...' on some of these.

Although these are all already coded and checked into branches. The effort is close to zero once they've been done.

Which is valid. 'Effort already expended' means we don't need to worry about asking for them, though that might make people feel bad about saying no.

I have to say: This has proved useful on more than one occasion. Thanks again.