R33. Add address in the backend

[paarals]

Is your feature request related to a problem? Please describe.

Describe the solution you'd like As an admin, I want to see the address of the proposals in the detailed proposal (backend)

Mock up

Does this issue could impact on users private data?

Acceptance criteria

• [x] As an admin, I can see the address in the detailed proposal.

Technical specifications https://github.com/openpoke/decidim/issues/50

Implementation

Testing

Additional context

[paarals]