Checkmk Werk 7980: Prevent deletion of contact groups while referenced in hosts or folders

ID: 7980 Title: Prevent deletion of contact groups while referenced in hosts or folders Component: WATO Level: 1 Class: Bug fix Version: 1.7.0i1 Previously contact groups could be deleted while still being referenced in hosts or folders which lead to some strange effects in the GUI. Besindes the existing validations the contact group deletion feature is now preventing the deletion of groups in case it is still in use by a folder or host.