Upgrade to Blacklight 5.8
More facets modal defaults to numerical sort

Post-Blacklight 5.8 update, the modal that show additional terms for a
give facet now defaults to numerical sorting, as a opposed to alpha
sorting.
Merge pull request #787 from projecthydra/update_master_to_bl-5.8

Update master to bl 5.8
Styles count for views and downloads, refs #9672