Fix linking objects on search pages

Issue #2976

Page for testing:
/search/gene/dpy-

Currently broken on live (http://www.wormbase.org/search/gene/dpy-) where the locus text is removed completely from the gene descriptions.

Wasn't creating link when there was no taxonomy associated with the page.


Yeah, it used to be called link, but I discovered that if you set link to true it *doesn't* link the object! So I changed it to no_link.