Subsets

Add a new toplevel page to display the list of Subsets. The page should use regular pagination.

On click on subset title, the details page of the selected Subset is displayed. Please update the links from the accession page to this new subset details page (they now point to Genesys website).

Use basic bootstrap CSS, see the accessions section for examples.

The route should be enabled if config.accession.subsets === true.