EDIT

ref #6169 UserHelper checking permissions:

• UserHelper as SpringComponent which selfregisters in the VaadinSession
• disabling fields in PersonField of User has not sufficient permissions

ref #6169 harmonizing the check if user is curator

ref #6169 displaying the Registration.submitter to curators

• implementation of a UserHelper

ref #6169 inserting Role Curation as required data

ref #6169 filtering registration list by role, user and status in the 2 ListView modes

View based authentication with login dialog

Annotation based access control