Metadata link for Date uses wrong facet

[erinchambers]

On individual item view, Date: [link] in metadata box is pointing to a search on facet date_display, which turns up 0 results.

Example: https://ardhi.unl.edu/item/ardhi.treaty.00011
"Date: 1889" links to 0 results, but if you search All Items and facet on date.year there are 6 results for 1889

I wonder if the metadata box partial should use the date.year facet and not date_display in the link.