### 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)

{
    if (!clientModel)
        return;
    // G
    QList<QModelIndex> nodes = GUIUtil::getEntryData(ui->banlistWidget, BanTableModel::Address);
    for(int i = 0; i < nodes.count(); i++)
    {
        // G
        QString strNode = nodes.at(i).data().toString();
        CSubNet possibleSubnet;
        LookupSubNet(strNode.toStdString().c_str(), possibleSubnet);
        if (possibleSubnet.IsValid() && m_node.unban(possibleSubnet))
        {
            clientModel->getBanTableModel()->refresh();
        }
    }
}
void RPCConsole::clearSelectedNode()