[FIX]sale_timesheet : Convert the project overview values to the current currency

Steps to reproduce the bug:
- Go to Project app
- See the overview of any project
- Select at the top right another company with a different currency. But keep the company assigned to the current project selected

Problem:
The new currency is changed in the project overview, but the values are not converted to this currency.

opw-2479364

closes odoo/odoo#70525

Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>