Shorten the list of terms, with a more option

Issue Summary

First of, this module has been a lifesaver for me. Many many thanks!

I am looking for an additional feature, I think. I have a fairly long list of terms, and sometimes the list of terms is just really long and unwieldy. I'd really like to be able to provide a short list of terms to filter by with a MORE option which would expand the the list, or even go to another page that listed all the filter options. It would also be great if the list could be sorted by number of nodes, so that the filters with the most nodes could appear first. Perhaps this is already possible and I am just missing something?