### Describe the issue
Warning messages are not displayed when running bitcoin-qt 0.14.2 and 0.14.99 with -disablewallet.
It might be better to always display them.

E.g. on MainNet the "This is a pre-release test build - use at your own risk - do not use for mining or merchant applications" is lost
![image](https://user-images.githubusercontent.com/3296421/29109760-853e5394-7ce4-11e7-8f05-bfcd66ada471.png)
![image](https://user-images.githubusercontent.com/3296421/29109806-adf6e67a-7ce4-11e7-8564-8883c44656ad.png)

On TestNet also the "Warning: unknown new rules activated (versionbit 28)" is missed
![image](https://user-images.githubusercontent.com/3296421/29110269-6b24b79e-7ce6-11e7-91e7-823227eaa200.png)
![image](https://user-images.githubusercontent.com/3296421/29110035-9142cf34-7ce5-11e7-8faf-264e805cdaf4.png)

{
    int unit = walletModel->getOptionsModel()->getDisplayUnit();
    m_balances = balances;
    if (walletModel->privateKeysDisabled()) {
        ui->labelBalance->setText(BitcoinUnits::formatWithUnit(unit, balances.watch_only_balance, false, BitcoinUnits::separatorAlways));
        ui->labelUnconfirmed->setText(BitcoinUnits::formatWithUnit(unit, balances.unconfirmed_watch_only_balance, false, BitcoinUnits::separatorAlways));
        ui->labelImmature->setText(BitcoinUnits::formatWithUnit(unit, balances.immature_watch_only_balance, false, BitcoinUnits::separatorAlways));
        ui->labelTotal->setText(BitcoinUnits::formatWithUnit(unit, balances.watch_only_balance + balances.unconfirmed_watch_only_balance + balances.immature_watch_only_balance, false, BitcoinUnits::separatorAlways));
    } else {
        ui->labelBalance->setText(BitcoinUnits::formatWithUnit(unit, balances.balance, false, BitcoinUnits::separatorAlways));
        ui->labelUnconfirmed->setText(BitcoinUnits::formatWithUnit(unit, balances.unconfirmed_balance, false, BitcoinUnits::separatorAlways));
        ui->labelImmature->setText(BitcoinUnits::formatWithUnit(unit, balances.immature_balance, false, BitcoinUnits::separatorAlways));
        ui->labelTotal->setText(BitcoinUnits::formatWithUnit(unit, balances.balance + balances.unconfirmed_balance + balances.immature_balance, false, BitcoinUnits::separatorAlways));
        ui->labelWatchAvailable->setText(BitcoinUnits::formatWithUnit(unit, balances.watch_only_balance, false, BitcoinUnits::separatorAlways));
        ui->labelWatchPending->setText(BitcoinUnits::formatWithUnit(unit, balances.unconfirmed_watch_only_balance, false, BitcoinUnits::separatorAlways));
        ui->labelWatchImmature->setText(BitcoinUnits::formatWithUnit(unit, balances.immature_watch_only_balance, false, BitcoinUnits::separatorAlways));
        ui->labelWatchTotal->setText(BitcoinUnits::formatWithUnit(unit, balances.watch_only_balance + balances.unconfirmed_watch_only_balance + balances.immature_watch_only_balance, false, BitcoinUnits::separatorAlways));
    }
    
    
    bool showImmature = balances.immature_balance != 0;
    bool showWatchOnlyImmature = balances.immature_watch_only_balance != 0;
    
    ui->labelImmature->setVisible(showImmature || showWatchOnlyImmature);
    ui->labelImmatureText->setVisible(showImmature || showWatchOnlyImmature);
    ui->labelWatchImmature->setVisible(!walletModel->privateKeysDisabled() && showWatchOnlyImmature); 
}
void OverviewPage::updateWatchOnlyLabels(bool showWatchOnly)