[Bug Report] Error to convert when converting order to another currency

[oscarinak]

Bug report

The following error occurs when making a currency conversion at the point of sale, where when canceling an order that in this case is in USD, you want to change that amount to the currency in VES to verify what that would be. Amount in Bs based on the rate they handle that day and this is not allowed by the point of sale, since it does not show to change to another currency or the rate, as the other version of ADempiere usually showed

Steps to reproduce

The steps to follow for this case are:

1. Have an exchange rate loaded in ADempiere
2. Assemble an order from the point of sale, this can be in dollars or bolivars
3. Apply charge, and in the currency box, try to change to the other currency different from that of the order.

Screenshot or Gif（截图或动态图）

Link to minimal reproduction（最小可在线还原demo）

https://demo-ui.erpya.com/

Expected behavior

The expected result is that the point of sale in the ADempiere-Vue, allows at the time of making the charges to change to a different currency than the order so that it is canceled in a different currency than the point of sale based on the rate that is loaded in ADempiere, as detailed in the following image.