PURPOSE
As event will soon evolve (onchange -> compute, code improvements, addition of
new features) cleaning and improving tests is necessary to help avoid issues.
SPECIFICATIONS
Use _tz_get for tz-based selection fields from partner as it smartly order
available timezones.
Remove a strange "event.confirm" wizard that calls an unexisting method,
is not reachable and is actually completely unnecessary.
Reorganize ticket fields to ease future improvements and perform some
public -> private method cleaning.
Remove duplicated code in event_sale.
LINKS
Side effect of Task ID 2089156 (event onchange to compute)
Community PR odoo/odoo#43127
Enterprise PR odoo/enterprise#7656
prout
Thibault Delavallée
a04b209ce6