fix(sdk): make ControllingClient also receive new GameStates

This was lost in the refactor of c7b3841. ControllingClient is also an
IHistoryListener and needs to receive all GameStates for saving them.
This enables the GUI to display and step through a game using the
ControllingClient.

Author: SKoschnicke

sdk/src/server-api/sc/networking/clients/LobbyClient.java

@@ -312,6 +312,7 @@ public IControllableGame observeAndControl(PrepareGameProtocolMessage handle) {
     String roomId = handle.getRoomId();
     ControllingClient controller = new ControllingClient(this, roomId);
     addListener((IAdministrativeListener) controller);
+    addListener((IHistoryListener) controller);
     start();
     logger.debug("Sending observation request for roomId: {}", roomId);
     send(new ObservationRequest(roomId));