### 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)"
WalletModel::UnlockContext ctx(model->requestUnlock());
    if(!ctx.isValid())
    {
        
        fNewRecipientAllowed = true;
        return;
    }
    
    WalletModelTransaction currentTransaction(recipients);
    WalletModel::SendCoinsReturn prepareStatus;
    
    CCoinControl ctrl;
    if (model->getOptionsModel()->getCoinControlFeatures())
        ctrl = *CoinControlDialog::coinControl;
    updateCoinControlState(ctrl);
    prepareStatus = model->prepareTransaction(currentTransaction, ctrl);
    
    processSendCoinsReturn(prepareStatus,
        BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), currentTransaction.getTransactionFee()));
    if(prepareStatus.status != WalletModel::OK) {
        fNewRecipientAllowed = true;
        return;
    }
    CAmount txFee = currentTransaction.getTransactionFee();
    
    QStringList formatted;
    for (const SendCoinsRecipient &rcp : currentTransaction.getRecipients())
    {
        
        QString amount = "<b>" + BitcoinUnits::formatHtmlWithUnit(model->getOptionsModel()->getDisplayUnit(), rcp.amount);