In my system, decimal separator is comma. In transaction list in a GUI for all mounts decimal separator is point. But in amount filter field I can't enter point, only comma (which is decimal separator in my system), and, most likely because of that, filtering by amount does not work.

It's bitcoin-qt v0.16.0 with qt 5.9.4 on Gentoo Linux.

![image](https://user-images.githubusercontent.com/4500994/43676682-635500c6-97fe-11e8-9f14-490ecdce4adc.png)

{
    if(!transactionView || !transactionView->selectionModel())
        return;
    QModelIndexList selection = transactionView->selectionModel()->selectedRows(0);
    
    uint256 hash;
    QString hashQStr = selection.at(0).data(TransactionTableModel::TxHashRole).toString();
    hash.SetHex(hashQStr.toStdString());
    
    uint256 newHash;
    if (model->bumpFee(hash, newHash)) {
        
        transactionView->selectionModel()->clearSelection();
        model->getTransactionTableModel()->updateTransaction(hashQStr, CT_UPDATED, true);
        qApp->processEvents();
        Q_EMIT bumpedFee(newHash);
    }
}
void TransactionView::copyAddress()
{
    GUIUtil::copyEntryData(transactionView, 0, TransactionTableModel::AddressRole);
}
void TransactionView::copyLabel()
{
    GUIUtil::copyEntryData(transactionView, 0, TransactionTableModel::LabelRole);
}
void TransactionView::copyAmount()