loadSslCertificate(connection, prop, currentConnection, done) {
    if (connection[prop].certificateFileName) {
      Helper.loadFile(currentConnection[prop] ? currentConnection[prop].certificateFile : null, $('#inputCertificate'), (val) => {
        connection[prop].certificateFile = val;
        this.loadCertificateKeyFile(connection, prop, currentConnection, done);