Provide audit logs of any changes made to the users in Fusion

[#1]

We ran into the problem, that somehow the notification settings of our audit user have been changed. Only two people have access to that account and both denied doing the changes themselves. So it would have been great to see by whom those changes were made.

[#2]

We agree with this and have run into issues like this in Fusion. The enterprise grade logging we are expecting is not available in the admin console. Simple things like displaying the exact change made, who made the change, when did it occur, etc.