(no) Security audit for user actions

Specific actions that manages security permissions for users are now being reported in Administration panel.
Each entry row will consists of following columns:

Operation type - name of the operation performed,
Administrator Full Name - full name of admin user who performed given action,
User Full Name - full name of user that the action affects,
Description - text description of what has been changed for given user
Date and Time - date and time when the change has been done

Each row is also expandable, showing additional information about activity:

administration username and email that performed the action,
username and email of user that the action affects,
Country, Region and IP - GeoIP information if possible of administrator who performed action
User Agent - additional info of Administrator system.

List of user activities that will be reported in Administrative Activity tab:

1	changed user name
2	changed user full name
3	changed user description
4	changed user email
5	changed user provider
6	enabled user
7	disabled user
8	deleted user
9	assigned user to group
10	removed user from group
11	assigned user to role
12	removed user from role
13	assigned user to permission in security scheme
14	unassigned user from permission in security scheme
15	assigned user to FLS
16	unassigned user from FLS
17	added user

Administrator using Activity log can narrow list of activities by selecting User. List will show actions related to selected user.

Some additional features will be implemented for next version:

groups handling,
additional filtering possibilities (by date and operation type),
retention policy,
possibly adding new operation types if needed.