output of decrypting message is base64

[jim-obrien-orig]

com/radixdlt/client/application/translate/data/DecryptedMessage.java:75

	@Override
	public String toString() {
		return timestamp + " " + from + " -> " + to + ": " + encryptionState + " " + Base64.toBase64String(data);
	}

Why not just + String(data)?
When you subscribe to result of sending a message, it's very confusing.