Purpose
=======
Commit 92b9e3684607fbb0c9a7d3f2331292eac51ebdea removed the SO line popup form and added all the event
information fields directly in the sale order line tree view.
The event information should be hidden by default because they are only relevant for 'event_ok' products.
This commit will add an event configurator widget that will open a wizard when the selected product is 'event_ok'.
The widget will allow configuring the 'event_id' and the 'event_ticket_id' fields so that they can be safely removed
from the sale order line tree view.
The user can also edit the event configuration by using a button next to the product_id dropdown field
if the product is configured as 'event_ok'.
Registration are now for one attendee only. When buying several seats for an event
you have now one registration for each attendee.
event: nb_register field is removed; as well as unnecessary user_id and it subscribe /
unsubscribe behavior. Also slighly cleaned some views.
event_sale: do not auto confirm registrations linked to a draft sale order. Note: strange
origin is a char field, not a sale_order_id. Added a small wizard to edit attendees
data when confirming a sale order containing event related lines.
website_event: when buying free tickets, ask for attendee details. Added template,
controllers to handle that behavior.
website_event_sale: when buying tickets, ask for attendee details. Events ecommerce
should be better integrated with online events, using inheritance to add details
instead of being very different.
Aurélien Warnon