message: Move static data to unnamed namespace
  Strip no longer needed `static` keyword.
diff: using namespace NAS2D;
  -static constexpr int Width = 48;
  -static constexpr int Offset = constants::MarginTight + 32;
  +namespace
  +{
  +constexpr int Width = 48;
  +constexpr int Offset = constants::MarginTight + 32;
  -static const std::map<NotificationArea::NotificationType, Rectangle<float>> NotificationIconRect
  +const std::map<NotificationArea::NotificationType, Rectangle<float>> NotificationIconRect
  {
  {NotificationArea::NotificationType::Critical, {64, 64, 32, 32}},
  {NotificationArea::NotificationType::Information, {32, 64, 32, 32}},
  @@ -24,7 +26,7 @@ static const std::map<NotificationArea::NotificationType, Rectangle<float>> Noti
  };
  -static const std::map<NotificationArea::NotificationType, NAS2D::Color> NotificationIconColor
  +const std::map<NotificationArea::NotificationType, NAS2D::Color> NotificationIconColor
  {
  {NotificationArea::NotificationType::Critical, Color::Red},
  {NotificationArea::NotificationType::Information, Color::Green},
  @@ -32,12 +34,13 @@ static const std::map<NotificationArea::NotificationType, NAS2D::Color> Notifica
  };
  -static const std::map<NotificationArea::NotificationType, std::string> NotificationText
  +const std::map<NotificationArea::NotificationType, std::string> NotificationText
  {
  {NotificationArea::NotificationType::Critical, "Critical"},
  {NotificationArea::NotificationType::Information, "Information"},
  {NotificationArea::NotificationType::Warning, "Warning"}
  };
  +}
  const Rectangle<float>& IconRectFromNotificationType(const NotificationArea::NotificationType type)
  