Make the submitter name link to a query for that submitter

Currently the submitter name is rendered as a mailto: link. This is
possibly useful in some circumstances, but in my experience is not
usually what I want. Although it opens a mail to the submitter, it
doesn't include any of the patch context, so is not very helpful.

Instead the submitter link can be a link to a query for patches by that
submitter. In my experience that is more useful, ie. when looking at a
single patch for a submitter you can then quickly get the list of all
patches by them.

So do that conversion.

In order to do it we need to know the current project, so that becomes a
parameter to personify. I believe the url reversal is correct, though
it's not pretty, and pulling SubmitterFilter.param out feels a little
wrong, but is the best solution I could come up with.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>