When downsizing a license plans users are directed to delete on the _old_ server

When a user has to downsize bamboo instance the use is directed to a delete plans screen.
The link points to the bamboo server the last export was made from.
Plans on the previous server are deleted not on the current. The previous server may still be active and eligible to run unlimited plans.

On that screen a neon warning should be displayed and the base url should be questioned (if not the same as the current hostname/ip address)