It would be nice if the debug console had a little help page of itself, to describe the syntax to issue commands (also the nested ones), and a disclaimer that usage can be dangerous.

Maybe add a debug-console-only command like help that shows how to use nested commands and potentially other advanced tricks, and add 'for more information on using this console type XXX'.

See also:
- https://github.com/bitcoin/bitcoin/pull/7783#issuecomment-248274853
- https://github.com/bitcoin/bitcoin/issues/8544#issuecomment-240970925
- #8912 Console command paths cannot be specified correctly with backslashes
{
    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() && g_connman)
        {
            g_connman->Unban(possibleSubnet);
            clientModel->getBanTableModel()->refresh();
        }
    }
}
void RPCConsole::clearSelectedNode()