4058: If a portable data hash correpsonds to a single collection, automatically
redirect to the collection page.  If not, show a special "menu" page listing
the matching collections.
4058: Tests for portable data hash redirection and multiple matches page.
4058: Tweaked presentation per review feedback
4058: Typo fix "collection" -> "collections"
Merge branch '4058-workbench-collection-redirect' closes #4058