[IMP] base: no default domain for partner's title

The title field should not have a domain by default.
When a new record is created or the 'is company' field is changed, the onchange_type is triggered to restrict the domain accordingly to is_company field.
When an existing record is modified, there will have no domain on title field. It's not ideal but at least companies will be able to change the title without the need to modify twice the field is_company.
Fixes #1713
[FIX] account: explicitely refreshed invoice browse_record(...) in order to have correct 'date' in account.move. (Maintenance Case: 611210)
update the branch to use context_today() date instead of time.strftime() for date_invoice
removed unnecessary condition which was used to set account move date