[Smidsy] pin age 7 days for /around/ page

This is to ensure that on the create new report page, we only
see recently logged issues, as we expect them to cluster on
busy junctions, and *want* duplicate reports (unlike the classic
FMS behaviour).

As I understand it, this should *not* affect the behaviour on
/reports/ which seems to be related to the reports_per_page
config, as opposed to on_map_default_max_pin_age
[Smidsy] genericise display of severity

Get all data from cobrand, making it easier to supply descriptions
etc.