Check_MK Werk 5198: Delete contact groups: Fixed error message when users have no alias

ID: 5198 Title: Delete contact groups: Fixed error message when users have no alias Component: Multisite Level: 1 Class: Bug fix Version: 1.5.0i1 The error message that prevents the deletion of a contact group when it is assigned to a user could contain the text "User: None" when a user had no alias set. In case there is no alias for the user it shows the user ID now.