Adds margin to record callnumber browse display
Replaces footer icon and margin changes
Merge pull request #655 from sul-dlss/callnumber-line-height

Adds margin to record callnumber browse display
Merge pull request #656 from sul-dlss/footer-icon

Replaces footer icon and margin changes
fixes issue with datatables-rails version
Merge pull request #661 from sul-dlss/update-dt-gem

fixes issue with datatables-rails version
Only call #any? on mhlds when they are present.