List rows show their paths — rounding out the day's four usability fixes

The fourth fix of the day: AdditiveList's fallback display becomes host+path instead of hostname alone, so a blog_index stream at gatesfoundation.org/<path> stops masquerading as the root domain and same-domain entries stop being identical twins. With it, all four issues filed from today's workbench sessions are fixed, shipped, and closed — same day.