Group case: "Twitter Followers for ...." - additional , distinct email address

[Andreas W. Kuhn]

Group case: "Twitter Followers for ...."

 1. Add a distinct email address to the group Twitter Followers for Andreas Kuhn (DT)

 2. Save.

 3. 'edit group' "Twitter Followers for ...."

 4. Delete the under point 1. added email address.

 5. -> Warning that this group can only be read by 'only me'

 6. Switch 'only me' is set and can no longer be removed until an additional email address is added.