Link to login on question view when not logged in

(where answer box would normally be)
Extract small styling on mini-counts out into a separate media block
Display vote/answer count on top of one another when on xs screens
Add support for displaying mini-counts on sidebar-ed pages

This was tricky to find a good way of setting this out - too many element/
resolution conditionals to clean up though.

This means question summaries can be displayed on pages with sidebars. When all
pages have been migrated to pages w/sidebars the hacky #page-wrap stuff can
become the default style