fix #6687 per view implementation of the 'session-per-conversation' pattern
ref #6169 Delete button in editors optional
#6169 configure the enable state of fields in a fieldGroup individually
pulling up injectPresenter() in View class hierarchy
#6169 generic cdm entity select lists and using them in the Registration editor
seperating out content initialization from View constructors
ref #6169 initial Popup editor for Registrations