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)


connect(ui->radioTreeMode, &QRadioButton::toggled, this, &CoinControlDialog::radioTreeMode);
    connect(ui->radioListMode, &QRadioButton::toggled, this, &CoinControlDialog::radioListMode);
    
    connect(ui->treeWidget, &QTreeWidget::itemChanged, this, &CoinControlDialog::viewItemChanged);
    
    ui->treeWidget->header()->setSectionsClickable(true);
    connect(ui->treeWidget->header(), &QHeaderView::sectionClicked, this, &CoinControlDialog::headerSectionClicked);
    
    connect(ui->buttonBox, &QDialogButtonBox::clicked, this, &CoinControlDialog::buttonBoxClicked);
    
    connect(ui->pushButtonSelectAll, &QPushButton::clicked, this, &CoinControlDialog::buttonSelectAllClicked);
    ui->treeWidget->setColumnWidth(COLUMN_CHECKBOX, 84);
    ui->treeWidget->setColumnWidth(COLUMN_AMOUNT, 110);
    ui->treeWidget->setColumnWidth(COLUMN_LABEL, 190);
    ui->treeWidget->setColumnWidth(COLUMN_ADDRESS, 320);
    ui->treeWidget->setColumnWidth(COLUMN_DATE, 130);
    ui->treeWidget->setColumnWidth(COLUMN_CONFIRMATIONS, 110);
    ui->treeWidget->setColumnHidden(COLUMN_TXHASH, true);         
    ui->treeWidget->setColumnHidden(COLUMN_VOUT_INDEX, true);     
    
    sortView(COLUMN_AMOUNT, Qt::DescendingOrder);
    
    QSettings settings;
    if (settings.contains("nCoinControlMode") && !settings.value("nCoinControlMode").toBool())
        ui->radioTreeMode->click();
    if (settings.contains("nCoinControlSortColumn") && settings.contains("nCoinControlSortOrder"))
        sortView(settings.value("nCoinControlSortColumn").toInt(), (static_cast<Qt::SortOrder>(settings.value("nCoinControlSortOrder").toInt())));
}
CoinControlDialog::~CoinControlDialog()