browse page: undo my mistaken reordering of divs

(fixes a clear:both issue on small screens)
browse page: no top-border-bar for first child needed now
browse page: better way of specifying "time ago" (for i18n)
browse page: more approachable headings

(involves slightly rejigging the way printable_name() invokes i18n)
browse page: ensure neat render (no spurious top bar) when no-tags-no-comment