Ability to restrict GL accounts on Sales and Purchases.
Option on the GL account card to allow sales or allow purchases which should then restrict the account available on the dropdown from documents.
Generally the only accounts that are needed on a sales document are income accounts. Balance sheets accounts are not needed for sales documents having a full list of accounts can causes issues and confusion with processing.
Similarly Purchases documents generally only need expenses accounts.
Restricting what accounts are available will also increase the speed the lists opens as well as time it takes to process documents