Add shortcut links to Topic facet browse

[wickr]

As the list of Topic facets increases (and possibly others), it will be harder to browse through the list. The pop up window helper provides an A-Z sort and a Numerical sort along with Next/Previous Page links.

We could also possibly add first-letter shortcuts, like:
0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

This was suggested by Brian Davis at OSU