### 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)

"   example:    getblock(getblockhash(0),true)[tx][0]\n\n")));
            return;
        }
        std::string wallet_id = walletID.toStdString();
        if (!RPCConsole::RPCExecuteCommandLine(m_node, result, executableCommand, nullptr, walletID.isNull() ? nullptr : &wallet_id))
        {
            Q_EMIT reply(RPCConsole::CMD_ERROR, QString("Parse error: unbalanced ' or \""));
            return;
        }
        Q_EMIT reply(RPCConsole::CMD_REPLY, QString::fromStdString(result));
    }
    catch (UniValue& objError)
    {
        try // 
        {
            int code = find_value(objError, "code").get_int();
            std::string message = find_value(objError, "message").get_str();
            Q_EMIT reply(RPCConsole::CMD_ERROR, QString::fromStdString(message) + " (code " + QString::number(code) + ")");
        }
        catch (const std::runtime_error&) // 
        {   // 
            Q_EMIT reply(RPCConsole::CMD_ERROR, QString::fromStdString(objError.write()));
        }
    }
    catch (const std::exception& e)
    {
        Q_EMIT reply(RPCConsole::CMD_ERROR, QString("Error: ") + QString::fromStdString(e.what()));
    }
}
RPCConsole::RPCConsole(interfaces::Node& node, const PlatformStyle *_platformStyle, QWidget *parent) :