[moneydance] Build 581: I still get rich on dividend!

[Michael Casteel]

Build 581 indeed seems to avoid recording a price history entry when
accepting a downloaded Dividend transaction from my Schwab account.
But, a price (still $10,000) appears in the transaction in the
Register, and the CURRENT price for the security is set to $10,000,
reflected in the Portfolio view and causing a jump in MD's calculation
of Net Worth until a correct price is set.