Task #3852: Send plain values array instead of full feedback object

src/main/java/de/thm/arsnova/socket/ARSnovaSocketIOServer.java

@@ -47,7 +47,7 @@ public class ARSnovaSocketIOServer {
 					public void onData(SocketIOClient client, Feedback data) {
 						logger.info("setFeedback.onData: Client: {}, message: {}", new Object[] {client, data});
 						sessionService.postFeedback(data.getSessionkey(), data.getValue());
-						server.getBroadcastOperations().sendEvent("updateFeedback", sessionService.getFeedback(data.getSessionkey()));
+						server.getBroadcastOperations().sendEvent("updateFeedback", sessionService.getFeedback(data.getSessionkey()).getValues());
 					}
 		});