message: show negative balance as negative also for usd
diff: @@ -201,7 +201,9 @@ export const TransactionScreen = ({ transactions, refreshing, navigation, curren
  const sections = formatTransactions(transactions)
  const AccountDetailItem: React.FC<AccountDetailItemProps> = (props) => {
  - const amount = prefCurrency === "sats" ? props.amount : props.usd
  + const amount = prefCurrency === "sats" ?
  + props.amount :
  + props.amount > 0 ? props.usd : - props.usd // manage sign for usd. unlike for amount usd is not signed
  const symbol = prefCurrency === "sats" ? '' : "$"
  const precision = prefCurrency === "sats" ? 0 : amount < 0.01 ? 4 : 2
  