message: Add a formatter for 64-bit integers
diff: @@ -676,6 +676,7 @@ struct Formatter
  return Format(u, true);
  }
  static QString Format(int32_t i, bool hex = false) { return QString::number(i); }
  + static QString Format(int64_t i, bool hex = false) { return QString::number(i); }
  static const QFont &PreferredFont() { return *m_Font; }
  static const QColor DarkCheckerColor() { return m_DarkChecker; }
  static const QColor LightCheckerColor() { return m_LightChecker; }
  