[FIX] event, website_event_questions: fix misc event

Add a domain that limits to the answers belonging an event only on the
attendee form.

Make the width of the event_type_mail_ids 100%

Sort event.registrations by id DESC and Kanban view by name

task-2071337

closes odoo/odoo#37256

Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>