With this commit we ensure website_menu field is computed before calling
create. Indeed otherwise it is computed after the create if value is not
given and stays to False. This is due to the compute that does not distinguish
a False value from user from a False value added as default. This breaks
the event type -> event synchronization when no form view is used (either
through UI or in code).
With this commit, it is computed before resuming the creation and field
is correctly synchronized with the template value unless the user gives
a value at create time.
Task-2341656 (Event submenus shenanigans)
Part-of: odoo/odoo#81068
Thibault Delavallée
d55165931a