message: Fix reserve balance option
diff: #include <QNetworkProxy>
  #include <QSettings>
  #include <QStringList>
  +#include "utilmoneystr.h"
  OptionsModel::OptionsModel(QObject *parent, bool resetSettings) :
  QAbstractListModel(parent)
  @@ -103,8 +104,8 @@ void OptionsModel::Init(bool resetSettings)
  if (!settings.contains("nReserveBalance"))
  settings.setValue("nReserveBalance", (qint64)nReserveBalance);
  - if (!gArgs.SoftSetArg("-reservebalance", settings.value("nReserveBalance").toString().toStdString()))
  - nReserveBalance = gArgs.GetArg("-reservebalance", nReserveBalance);
  + if (!gArgs.SoftSetArg("-reservebalance", FormatMoney(settings.value("nReserveBalance").toLongLong())))
  + ParseMoney(gArgs.GetArg("-reservebalance", ""), nReserveBalance);
  else
  nReserveBalance = settings.value("nReserveBalance").toLongLong();
  