Activate or suspend a Block
Open a Block to citizens when it is ready, or close it.
A Block starts in setup: its staff can work, but citizens cannot choose it. Activate Block needs at least one GP and one Block Admin.

- Activate Block: citizens can use the portal at the Block's address.
- Suspend Block: staff keep their data, but citizens cannot choose the Block.
- Reactivate Block reverses it.
Invite Block Admin adds another Block Admin to the Block.