Synchronize on network game start, so that everyone has received all avatars and player names before the game starts. Store all computer players in a separate list on the server for name retrieval.

src/net/servergamethread.h

@@ -143,6 +143,7 @@ private:
 friend class AbstractServerGameStateReceiving;
 friend class AbstractServerGameStateRunning;
 friend class ServerGameStateInit;
+friend class ServerGameStateWaitAck;
 friend class ServerGameStateStartGame;
 friend class ServerGameStateStartHand;
 friend class ServerGameStateStartRound;