title: Odoo 13.0 website_sale: convert price from company currency to public pricelist
body: <p>In Odoo 12 we had a function to get current website pricelist and company currency id, and then convert product price from company currency id to website currency id.</p>
  <p>This function:  <code>_get_compute_currency()</code></p>
  <p>But in Odoo 13, Odoo team removed it.</p>
  <p>I am asking, if we use website sale in multi-currencies and my company currency is neither USD nor EUR, what option for me to convert product from my company currency to pricelist?</p>