ref #6169 first implementation of delete operations
ref #6169 implementing lazy loading ToOneRelatedEntityCombobox field and using it for inReferences
ref #6169 RelatedEntityListSelect (ToOneRelatedEntityField) edit and select working, add blocked by #6673
ref #6169 RelatedEntityListSelect field with add and edit button
ref #6169 RegistrationItemButtonGroups: making names and typeDesignations clickable
ref #6612 support for editor widgets with nested FieldGroups
ref #6612 Team and Person editor widgets implemented and integrated in reference editor
ref #6612 Custom Textfield with switch for all protectable cache fields