fix #8184 using NativeSelect instead of ListSelect to avoid circumvent a bug in the ListSelect which affects the Chrome browser
ref #7995 invoking Registration.updateStatusAndDate() from RegistrationEditorPresenter
ref #7995 invoking Registration.updateStatusAndDate() also in RegistrationPopupEditor on status changes
fix #6687 per view implementation of the 'session-per-conversation' pattern
ref #6169 initial Popup editor for Registrations