Fix typeahead, which broke when I upgraded typeahead.js

@thraxil Here's a fix for this bug https://dmt.ccnmtl.columbia.edu/item/95233/

This broke when I updated typeahead.js. typeahead 0.9.3 was throwing some errors after the jQuery upgrade, so I updated typeahead which at least fixed the errors in the console. Unfortunately I didn't know where in dmt to actually test this, so the bug was introduced.

I'll see if I can get some casper tests on this in a separate pull request.