gnucash stable: Edit Exchange Rate: Improve the message and comment

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/c935c2fb (commit)
	from  https://github.com/Gnucash/gnucash/commit/1547719b (commit)



commit c935c2fbb8e4a318ffa5a8a8ffbae90274f103e7
Author: John Ralls <jralls at ceridwen.us>
Date:   Sun Jul 26 11:49:56 2026 -0700

    Edit Exchange Rate: Improve the message and comment
    
    explaining why the Transfer Dialog isn't shown when Edit Exchange
    Rate is selected from the context menu in a stock-type register.



Summary of changes:
 gnucash/register/ledger-core/split-register-control.cpp | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)