EDIT

ref #7195 introducing the concept of EditorActionContext stacks to facilitate creating blocking relations

ref #6612 updating UI components on modified References - bugfixes

ref #6612 introducing EntityChangeEvent and generalizing Event class hierarchy

ref #6169 renaming EntityEvents into EditorEvents to better express the purpose

ref #6169 message count indicator, edit reference button and impoved layout

ref #6169 initial RegistrationWorkingSet implementation