#241 made the host sections pills: on a desktop they took two lines,
unlike the breadcrumb the pages had. computes/host_nav.html is the
breadcrumb again, one line at 1200 px and wider, still shared by the
eleven host pages: the section's own page is its bold item with
aria-current="page", an item page (a pool, a network) links its
section in bold with aria-current="true".
The capacity lines were kept on one line, made for the Computes
table: in the overview's narrower cards a long memory line ran out of
its card. They now wrap.