Link to specific export or excerpt in "order finished" email notification

Created by: das-g

Currently, "Extraction Order ... finished" email notifications have the link to the export overview page http://<production domain>/exports/

As I might have ordered other exports by the time I get (or read) the email, I might see those at the top of that page. It'd be more useful if the link would at least take me to the relevant excerpt. Either the link should take me to the excerpt's detail page (if so, also make this accessible from the overview page for excerpts with less than 5 exports, e.g. by making the excerpt name a link) or it should jump to the right excerpt within the overview page.