[Server] Rely on the player order event instead of a full state resend

cmdSetPlayerOrder re-sent the whole game state after reseating, so every
client reloaded its deck view mid-lobby for no reason. The new seating reaches
clients through the Event_PlayerOrderChanged that reseatPlayers broadcasts.

libcockatrice_network/libcockatrice/network/server/remote/game/server_abstract_participant.cpp

@@ -457,8 +457,8 @@ Response::ResponseCode Server_AbstractParticipant::cmdSetPlayerOrder(const Comma
         game->reorderPlayerSeats(playerNames);
     }
 
-    game->sendGameStateToPlayers();
-
+    // Clients learn the new seating from the Event_PlayerOrderChanged that
+    // reseatPlayers broadcasts; no full game state resend is needed for it.
     return Response::RespOk;
 }