### 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->peerWidget, PeerTableModel::NetNodeId);
    for(int i = 0; i < nodes.count(); i++)
    {
        // G
        NodeId id = nodes.at(i).data().toLongLong();
	// G
	int detailNodeRow = clientModel->getPeerTableModel()->getRowByNodeId(id);
	if(detailNodeRow < 0)
	    return;
	// Find possible nodes, ban it and clear the selected node
	const CNodeCombinedStats *stats = clientModel->getPeerTableModel()->getNodeStats(detailNodeRow);
	if(stats) {
            m_node.ban(stats->nodeStats.addr, BanReasonManuallyAdded, bantime);
	}
    }
    clearSelectedNode();
    clientModel->getBanTableModel()->refresh();
}
void RPCConsole::unbanSelectedNode()