transfers not updating organisation in KPI if user neither accepts nor rejects request

[eatyourpeas]

When the transfer request is in flight (update_lead_site) the Site model is updated but not the KPI model with the new organisation.

On accept/reject this does now happen but there is the possibility that a user may neither accept nor reject the patient, so there will be a mismatch

To fix this as well as update the Organisation in Site at the time the request is made, the same should happen for KPI, and reverse this only if the request is actively rejected.