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->treeWidget, &QWidget::customContextMenuRequested, this, &CoinControlDialog::showMenu);
    connect(copyAddressAction, &QAction::triggered, this, &CoinControlDialog::copyAddress);
    connect(copyLabelAction, &QAction::triggered, this, &CoinControlDialog::copyLabel);
    connect(copyAmountAction, &QAction::triggered, this, &CoinControlDialog::copyAmount);
    connect(copyTransactionHashAction, &QAction::triggered, this, &CoinControlDialog::copyTransactionHash);
    connect(lockAction, &QAction::triggered, this, &CoinControlDialog::lockCoin);
    connect(unlockAction, &QAction::triggered, this, &CoinControlDialog::unlockCoin);
    
    QAction *clipboardQuantityAction = new QAction(tr("Copy quantity"), this);
    QAction *clipboardAmountAction = new QAction(tr("Copy amount"), this);
    QAction *clipboardFeeAction = new QAction(tr("Copy fee"), this);
    QAction *clipboardAfterFeeAction = new QAction(tr("Copy after fee"), this);
    QAction *clipboardBytesAction = new QAction(tr("Copy bytes"), this);
    QAction *clipboardLowOutputAction = new QAction(tr("Copy dust"), this);
    QAction *clipboardChangeAction = new QAction(tr("Copy change"), this);
    connect(clipboardQuantityAction, &QAction::triggered, this, &CoinControlDialog::clipboardQuantity);
    connect(clipboardAmountAction, &QAction::triggered, this, &CoinControlDialog::clipboardAmount);
    connect(clipboardFeeAction, &QAction::triggered, this, &CoinControlDialog::clipboardFee);
    connect(clipboardAfterFeeAction, &QAction::triggered, this, &CoinControlDialog::clipboardAfterFee);
    connect(clipboardBytesAction, &QAction::triggered, this, &CoinControlDialog::clipboardBytes);
    connect(clipboardLowOutputAction, &QAction::triggered, this, &CoinControlDialog::clipboardLowOutput);
    connect(clipboardChangeAction, &QAction::triggered, this, &CoinControlDialog::clipboardChange);
    ui->labelCoinControlQuantity->addAction(clipboardQuantityAction);
    ui->labelCoinControlAmount->addAction(clipboardAmountAction);
    ui->labelCoinControlFee->addAction(clipboardFeeAction);
    ui->labelCoinControlAfterFee->addAction(clipboardAfterFeeAction);
    ui->labelCoinControlBytes->addAction(clipboardBytesAction);
    ui->labelCoinControlLowOutput->addAction(clipboardLowOutputAction);
    ui->labelCoinControlChange->addAction(clipboardChangeAction);