message: Change `Robot` foward declare to include in `MapViewState`
  The `MapViewState` header file makes use of the `Robot::Type` enum
  defined in `Robot.h`, so a full include is needed.
diff: #include "../RobotPool.h"
  #include "../PopulationPool.h"
  #include "../Population/Population.h"
  +#include "../Things/Robots/Robot.h"
  #include "../Things/Structures/Structure.h"
  #include "../UI/NotificationArea.h"
  @@ -67,7 +68,6 @@ struct MapCoordinate;
  class Tile;
  class TileMap;
  class MapView;
  -class Robot;
  class MainReportsUiState;
  