EDIT

navigating to RegistrationStart after Reference deletion in empty registration sets

removing useless select clean

removing old commented code

fix #7574 adding the ToOneRelatedEntityReloader to the TeamOrPerson and Person field directly

fix #7568 Collector Field readlony when editor is readonly

ref #7566 solving problem with unselectable entities due to eagerly selection clearing in updateToolBarButtonStates()

ref #7566 using the COLLECTOR_TITLE for the collector combobox

ref #7558 clearing the hibernate session after exceptions and closing it after any use to avoid dirty sessions dangling around

fix #7554 resetting nested components readonly states when setting new team or person instance

ref #7550 replacing the selfregisration of the VaadinUserHelper to the vaadin session by a UserHelperAccess bean