Maybe they have some purpose, but it isn't immediately obvious. I tried Tree & List mode, they're never populated.

![image](https://user-images.githubusercontent.com/13134193/33488849-04a2c8a6-d6ed-11e7-85c3-5c05f1ec5346.png)

* Bitcoin-Qt 0.15.1 for Ubuntu 16.04 x64 (from http://ppa.launchpad.net/bitcoin/bitcoin/ubuntu xenial/main amd64)

Note: I just noticed I'm *not* seeing this on Ubuntu 17.10 x64 with 0.15.1 downloaded from bitcoincore.org. 

![image](https://user-images.githubusercontent.com/13134193/33491553-9584dc62-d6f5-11e7-9ba7-e074e0e36151.png)


{
    if (ui->radioTreeMode->isChecked() && contextMenuItem->text(COLUMN_ADDRESS).length() == 0 && contextMenuItem->parent())
        GUIUtil::setClipboard(contextMenuItem->parent()->text(COLUMN_ADDRESS));
    else
        GUIUtil::setClipboard(contextMenuItem->text(COLUMN_ADDRESS));
}
void CoinControlDialog::copyTransactionHash()
{
    GUIUtil::setClipboard(contextMenuItem->text(COLUMN_TXHASH));
}
void CoinControlDialog::lockCoin()
{
    if (contextMenuItem->checkState(COLUMN_CHECKBOX) == Qt::Checked)
        contextMenuItem->setCheckState(COLUMN_CHECKBOX, Qt::Unchecked);
    COutPoint outpt(uint256S(contextMenuItem->text(COLUMN_TXHASH).toStdString()), contextMenuItem->text(COLUMN_VOUT_INDEX).toUInt());
    model->wallet().lockCoin(outpt);
    contextMenuItem->setDisabled(true);
    contextMenuItem->setIcon(COLUMN_CHECKBOX, platformStyle->SingleColorIcon(":/icons/lock_closed"));
    updateLabelLocked();
}
void CoinControlDialog::unlockCoin()
{
    COutPoint outpt(uint256S(contextMenuItem->text(COLUMN_TXHASH).toStdString()), contextMenuItem->text(COLUMN_VOUT_INDEX).toUInt());
    model->wallet().unlockCoin(outpt);
    contextMenuItem->setDisabled(false);
    contextMenuItem->setIcon(COLUMN_CHECKBOX, QIcon());
    updateLabelLocked();
}
void CoinControlDialog::clipboardQuantity()