prefs: cloud_new_password is not a preference

It's a mamber of the cloud storage authentication class, used to hold the
proposed new password until the backend has accepted it.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

core/cloudstorage.h

@@ -21,6 +21,7 @@ slots:
 private:
 	QNetworkReply *reply;
 	QString userAgent;
+	QString cloudNewPassword;
 };
 
 QNetworkAccessManager *manager();