Show 4 digits of precision to account for large differences in exchange rates in all supported local currencies

src/settings.cpp

@@ -281,7 +281,7 @@ void Settings::saveRestore(QDialog* d) {
 
 QString Settings::getUSDFormat(double bal) {
     //TODO: respect current locale!
-    return QLocale(QLocale::English).toString(bal * Settings::getInstance()->getZECPrice(), 'f', 2) + " " + QString::fromStdString(Settings::getInstance()->get_currency_name());
+    return QLocale(QLocale::English).toString(bal * Settings::getInstance()->getZECPrice(), 'f', 4) + " " + QString::fromStdString(Settings::getInstance()->get_currency_name());
 }
 
 QString Settings::getDecimalString(double amt) {