### 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)"
{
    GUIUtil::setClipboard(ui->labelCoinControlChange->text().left(ui->labelCoinControlChange->text().indexOf(" ")).replace(ASYMP_UTF8, ""));
}
void SendCoinsDialog::coinControlFeatureChanged(bool checked)
{
    ui->frameCoinControl->setVisible(checked);
    if (!checked && model) 
        CoinControlDialog::coinControl->SetNull();
    coinControlUpdateLabels();
}
void SendCoinsDialog::coinControlButtonClicked()
{
    CoinControlDialog dlg(platformStyle);
    dlg.setModel(model);
    dlg.exec();
    coinControlUpdateLabels();
}
void SendCoinsDialog::coinControlChangeChecked(int state)
{
    if (state == Qt::Unchecked)
    {
        CoinControlDialog::coinControl->destChange = CNoDestination();
        ui->labelCoinControlChangeLabel->clear();
    }
    else
        
        coinControlChangeEdited(ui->lineEditCoinControlChange->text());
    ui->lineEditCoinControlChange->setEnabled((state == Qt::Checked));
}
void SendCoinsDialog::coinControlChangeEdited(const QString& text)