[FIX] web: noshow list view aggregates w/ currency
[FIX] web: noshow list view aggregates w/ currency

In df69b5bb the aggregates of a column with currency was shown only if
records were of the same currency when a grouping was closed.

But when the list view is grouped, this would cause a number of issue:

- error if with first grouping is opened, another one is closed
- if the first grouping was closed aggregates were always shown
- the code only acts when closing a grouping
- aggregates could be shown when they should not
- aggregates could be not shown when they should

So this commit change things so this feature is ignored when the list
view is grouped.

There is also a fix so `currency_field` of the column is used instead of
just using `currency_id` that may be wrong.

note: only for saas-14 and saas-15 (feature is not present in saas-16)

opw-810835
closes #22598

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo