Display the affected systems in the incident cards

[calavera]

- Do you want to request a feature or report a bug?

This is bug.

- What is the current behavior?

There is no way which systems were affected by a past incident.

- If the current behavior is a bug, please provide the steps to reproduce.

There is no information in the incident card.

- What is the expected behavior?

We should display the affected systems with the incident.