unconfigured facet problems

[saracarl]

If you have metadata browse configured, but aren't filtering results by any of the metadata facets, when you search by part of a title you get the whole list of works back.

try with an accession number on this project (with metadata browse enabled), for instance: https://fromthepage.com/mountauburncemetery/mount-auburn-cemetery

[saracarl]

Similarly, if you enable facets but don't configure them, then no work will show up in the work list for a collection.

[benwbrum]

Proposed fix:

If metadata facets are enabled for a collection, but no facets have been configured,

• Display an error on the collection configuration screen under the facets button with a link to the facet config screen
• Make the collection#show action ignore facets.