[FIX] event_sale, website_event_sale: ACLs for event.event.ticket

event.event.ticket were set in website_event_sale, while this model is set in event_sale module
Manager acl moved from website_event_sale to event_sale
Created a new acl for event user in event_sale
Left the acl for everyone in website_event_sale, meaning that when this module is installed, everyone can read tickets, event those who aren't event user
[TYPO] in crm_partner_assign
[FIX] website_sale: force changing pricelist on different account signin

opw-607517
[FIX] payment_paypal: wrong handling fees computation formula
[MERGE] Forward-port of latest saas-3 bugfixes, up to rev. df0ae7e4d155a180f5e49e85f18ce52bf503c22c