fixing ugly 'null' representation in vaadin TextField
ref #6867 assigning UPDATE,DELETE for new Persons and Teams and fixing bugs related to TeamOrPersonField:
ref #6759 using new dom style of switch
ref #6759 using new icon style of switch
ref #6169 ToManyRelatedEntitiesComboboxSelect, CdmFilterablePagingProvider and CdmTitleCacheCaptionGenerator implemented
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