Fixes backlinks, adds icon for NAL, collapses 'my references'

- Fixes orbit backlinks refs #1852. Backlinks should be generalized
  in Metastore and put in a JSON structure.
- Adds 'home' icon for NAL option in Get It box.
- Collapses 'My References' "facet" on front page to make service
  menu more visible. Since this absurd demand for visibility exists,
  the front page should probably be re-designed altogether.