In order to make the expense form more intuitive, it was necessary to distinguish between whether the product has cost different from
zero or not. Depending ot this context, some fields are shown or not. Also 'Bill Reference' is shown only to account managers.
Now the expense can be submitted in different currency and it can be reimbursed in company’s currency.
In case the latter two currencies differ from each other,
the conversion is done automatically and the rate is also displayed.
Suggestion - untaxed_amount can be removed
Task - 2366775
closesodoo/odoo#61920
Related: odoo/enterprise#14838
Related: odoo/upgrade#2028
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>