message: Mark MajorEventAnnoucement Image as const
diff: @@ -33,7 +33,7 @@ private:
  MajorEventAnnouncement& operator=(const MajorEventAnnouncement&) = delete;
  private:
  - NAS2D::Image mHeader{"ui/interface/colony_ship_crash.png"};
  + const NAS2D::Image mHeader{"ui/interface/colony_ship_crash.png"};
  std::string mMessage;
  