### Howto replace a stuck transaction with another with higher fee ?

bitcoind 0.15.0

The marking option "Request Replace-By-Fee" in the sending transaction GUI page should have a better understandable text.

The sender does not "request" anything when creating the transaction. This is just a tag for a later possibility, as I understand as a rather normal user.

I would suggest something like

"Let me increase the fee of this transaction later, if it should not get confirmed in expected time ('Replace-By-Fee' feature)"
msgParams.second = CClientUIInterface::MSG_ERROR;
        break;
    case WalletModel::AbsurdFee:
        msgParams.first = tr("A fee higher than %1 is considered an absurdly high fee.").arg(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), maxTxFee));
        break;
    case WalletModel::PaymentRequestExpired:
        msgParams.first = tr("Payment request expired.");
        msgParams.second = CClientUIInterface::MSG_ERROR;
        break;
    
    case WalletModel::OK:
    default:
        return;
    }
    Q_EMIT message(tr("Send Coins"), msgParams.first, msgParams.second);
}
void SendCoinsDialog::minimizeFeeSection(bool fMinimize)
{
    ui->labelFeeMinimized->setVisible(fMinimize);
    ui->buttonChooseFee  ->setVisible(fMinimize);
    ui->buttonMinimizeFee->setVisible(!fMinimize);
    ui->frameFeeSelection->setVisible(!fMinimize);
    ui->horizontalLayoutSmartFee->setContentsMargins(0, (fMinimize ? 0 : 6), 0, 0);
    fFeeMinimized = fMinimize;
}
void SendCoinsDialog::on_buttonChooseFee_clicked()
{
    minimizeFeeSection(false);
}
void SendCoinsDialog::on_buttonMinimizeFee_clicked()