More template consolidation
More markup and CSS tweaks
Improve display of annotation links and fix admin access point editor typeahead. Fixes #451
Font changes.

The 'Lato' google web font looked bad with a lot of gylphs we need,
such as Latvian diacritics. No other (free) web fonts seem to be
available that look nice for headings and have wide glyph support.
For the time being the heading font as been changed to bootstrap
default serif (with the body font still sans-serif.)
Remove the link to hist agents from the main nav bar
For the nth time, attempt to improve rendering of related-item links
Merge branch 'new_front_page' into virtual_collection_rework_interface_wip
with additional fixes.

Conflicts:
	modules/core/app/assets/css/_ehri-vars.less
	modules/core/app/assets/css/admin.less
	modules/core/app/assets/css/ehri/_panels.less