Bitcoin Core v0.21.1

`bitcoin-cli walletprocesspsbt` does not trigger a `wallet locked please enter passphrase` warning when using a wallet which holds private keys. To be clear I am experiencing this behavior when using the `default` wallet created by core.

The expected behavior would be to remind the user they are dealing with an encrypted wallet, since `walletprocesspsbt` attempts to access private keys to sign the psbt. It would be useful if a warning were present in the rpc response to remind the user they are dealing with an encrypted wallet. 
.arg(BitcoinUnits::formatHtmlWithUnit(m_client_model->getOptionsModel()->getDisplayUnit(), totalAmount)));
        tx_description.append(QString("<br /><span style='font-size:10pt; font-weight:normal;'>(=%1)</span>")
            .arg(alternativeUnits.join(" " + tr("or") + " ")));
    }
    size_t num_unsigned = CountPSBTUnsignedInputs(psbtx);
    if (num_unsigned > 0) {
        tx_description.append("<br><br>");
        tx_description.append(tr("Transaction has %1 unsigned inputs.").arg(QString::number(num_unsigned)));
    }
    return tx_description.toStdString();
}
void PSBTOperationsDialog::showStatus(const QString &msg, StatusLevel level) {
    m_ui->statusBar->setText(msg);
    switch (level) {
        case StatusLevel::INFO: {
            m_ui->statusBar->setStyleSheet("QLabel { background-color : lightgreen }");
            break;
        }
        case StatusLevel::WARN: {
            m_ui->statusBar->setStyleSheet("QLabel { background-color : orange }");
            break;
        }
        case StatusLevel::ERR: {
            m_ui->statusBar->setStyleSheet("QLabel { background-color : red }");
            break;
        }
    }
    m_ui->statusBar->show();
}
size_t PSBTOperationsDialog::couldSignInputs(const PartiallySignedTransaction &psbtx) {