Empty filter tags with counts

[jillpe]

Summary

reference: https://docs.google.com/spreadsheets/d/1XbfCosfI_P3N2JVYldD28p6Ca6AxNRbAOKbOcp1GRgo/edit?gid=0#gid=0

When the user is in the browse view on index catalog page, there are filters in left bar that have no text but there is a number next to it. UTK would like empty labels to be hidden from the facet list

Acceptance Criteria

• Empty labels are hidden from the facet list