[GNC] Feature request: Stock currency setting

[rsbrux]

I have been repeatedly frustrated by my failure to remember this advice 
from 
https://wiki.gnucash.org/wiki/Stocks/add_stock#Stocks_noted_in_foreign_currency

 >>

If you start your first (buy) transaction from your stock account, the 
currency of the parent account will be used. Assuming your default 
currency is USD and you wish to buy stocks in EUR, then you should first 
create a normal asset account of currency EUR and below this your stock 
accounts.

Alternatively you could start your first transaction from you EUR cash 
or bank account, but with the first approach everything is much clearer 
- also later if you forgot the nominal currency.

<<

I find it far more intuitive to start securities transactions from the 
account for the particular security, and I prefer to keep the parent 
accounts by account rather than by currency.  It is easier to start the 
transactions from a security account, because the fields provided are 
described in keeping with with securities transactions.  However, this 
often gets me in trouble with securities traded in a currency other than 
my base currency (CHF).  I suspect that I am not the only one with this 
problem. Would it be possible to add a selection for trading currency in 
the Security Editor?  It could default to the setting indicated above, 
but there would at least be a way to explicitly see and control what is 
now hidden and implicit.

As a case in point, I have a bank relationship which includes securities 
as well as accounts in both CHF and USD.  The bank erroneously booked 
the purchase of a USD-denominated security to my CHF account, and I duly 
recorded the transaction that way. After I complained to the bank, they 
rolled back the transaction and posted it to my USD account instead.  
Now I see no way of correcting the entries in GnuCash other than to 
delete the account for the particular security and to recreate it via a 
transaction starting from my USD account.  Am I missing something here?