UI tweaks for East Sussex

See https://github.com/mysociety/fixmystreet-commercial/issues/641 and https://github.com/mysociety/fixmystreet-commercial/issues/642

Have already had feedback on these, and addressed some concerns.
http://eastsussex.commercial.fixmystreet.staging.mysociety.org/report/92
This change to use a variable should be applied to the parent template.
In fact, again, this overrides a whole template just to add a couple of new "Public" messages - although less important with these shorter templates, it would perhaps be better to add a new "after_name" template that could be included by the parent instead or similar?