Transfer: add ability to filter values by facets
Transfer: add ability to filter values by facets

Transfer objects will now cary a “display” attribute which can be used to
determine whether or not the file should be displayed via the tree view.
The new Transfer.filter() method has been added to refresh this property
using the Facet service.

artefactual-labs/appraisal-tab,eckardm/appraisal-tab,artefactual-labs/appraisal-tab,djpillen/appraisal-tab,djpillen/appraisal-tab,eckardm/appraisal-tab