Show log of user-actions that happened in KAT

[zcrt]

Is your feature request related to a problem? Please describe.
When handling multiple organisations with multiple users it can become hard to understand which changes have happened in KAT.

Describe the solution you'd like
It would be nice to add a log panel to each organisation's crisis-room, and to the general crisis-room. E.g. a simple panel showing actions like:

• At [datetime] user [user] changed indemnification of object [object] to [indemnification-level]
• At [datetime] user [user] manually added object [object]
• At [datetime] user [user] enabled boefje [boefje]
• At [datetime] user [user] changed boefje setting [setting] (from [x] to [y])
• etc.

Ideally with hyperlinked texts to the relevant objects and boefjes etc.

Describe alternatives you've considered
Maybe crawling through logs or just hoping nothing important has changed.

Additional context
Multiple steps can be taken for this feature. E.g. first some simple logs in the interface for a single organisation, then across multiple organisations, then also adding hyperlinking and filtering (on user, object, ...) to this logs.

Related: #365