Automatic 'follow' of private users in participatory spaces

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

As an admin, when adding private users to a private space, I expect them to receive all the notifications about this space, without having to tell them to follow the space and its contents.

As a private user, I want to receive information about the private space automatically, without having to follow it manually.

Describe the solution you'd like

On the private user invitation mail, I should see an alert: "Because you were added to this private space, you'll be notified if there are updates on it."

Describe alternatives you've considered

None

Does this issue could impact on users private data?

No

Funded by

Might be funded by CHRHR