Fix the "view all uses" link when there are both local and global results

The code was incorrectly adding the link to the first section
no matter what. This wasn't caught by the existing assertions,
so these are being improved as well.

Change-Id: I4dcbf44b504bd4cb875b4058fe5604f2a3c871b7
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/44