Change display name when disabled

[Axel Wers]

This is specific legacy issue, exists since we can use login and display names. Not bug, but not good too.

1. Enable display names, so user can fill his login and display name (different, what is important - so login name will be LoginName and display name will be DisplayName)

2. Disable display names

3. Now you can search in ACP his display name, you'll find DisplayName

4. Edit Members

5. There is not possibility change his display name, we see only login name (so LoginName)

6. In this case we must re-enable display names and then change display names

7. Admin should have possibility to edit or change login and display names regardless if display names are disabled and especially when they are different.