Interface to add domains to organizations

[ghost]

We need interfaces to manage domains per organizations

• [ ] Each organization can have an arbitrary number of domains.
• [ ] The org admins should be able to add or delete domains.
• [ ] The org admins can manage settings per domain

[Ulrich-F]

1. since the number of domains can be large: do you need the possibility to filter the list of domains (like associated contacts in organization)?
2. which settings for a domain? shall we already implement some? or at least: how many will/could there be? just need some input for UI-layout-reasons

[ghost]

1. I think no, @certrik?
2. Same interface and settings as for the other network objects

[certrik]

1. No