LP#1741997: related headings in the browse list now hyperlink to heading, not bib...

LP#1741997: related headings in the browse list now hyperlink to heading, not bib results

To test
-------
[1] Perform a browse search set up to include a related
    heading, e.g., a broader or narrower term.
[2] Click on the hyperlinked heading; note that it returns
    the bibs associated with that heading.
[3] Apply the patch and repeat step #2; this time, clicking
    the link should move you to the relevant heading in the
    browse list.

Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>