Collection Search

This is a fairly large pull request.

It's completing the main story of DSC-138 "Collection Search" that links to a number of other stories(DSC-166, 167, 168, 140). But essentially the UI design for Facets and Filters requires user feedback. To come during testing.

Also @snezanam will integrate her task for export (DSC-139) with this.

The only outstanding work will be change some of the filters to dropdowns when @JonathanShaw  changes for Works and Copies are in master.