The BugsColumn was calling local_site_reverse with args as a tuple

instead of a list, which would cause an exception when the repository

had a bug tracker configured. This has been corrected by updating the

calling point to use a list instead of a tuple and inside the

local_site_reverse to cast args to a list before concatenation.
The parameters of local_site_reverse have also been documented.

Ran unit tests.
Viewed the dashboard with a review request filed against a repository

  with a bug tracker. Without this fix applied, the exception occured;

  with it applied, it did not.