### 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)

ui->dataDir->setText(model->dataDir());
        ui->blocksDir->setText(model->blocksDir());
        ui->startupTime->setText(model->formatClientStartupTime());
        ui->networkName->setText(QString::fromStdString(Params().NetworkIDString()));
        //
        QStringList wordList;
        std::vector<std::string> commandList = m_node.listRpcCommands();
        for (size_t i = 0; i < commandList.size(); ++i)
        {
            wordList << commandList[i].c_str();
            wordList << ("help " + commandList[i]).c_str();
        }
        wordList << "help-console";
        wordList.sort();
        autoCompleter = new QCompleter(wordList, this);
        autoCompleter->setModelSorting(QCompleter::CaseSensitivelySortedModel);
        ui->lineEdit->setCompleter(autoCompleter);
        autoCompleter->popup()->installEventFilter(this);
        // 
        startExecutor();
    }
    if (!model) {
        // 
        // 
        Q_EMIT stopExecutor();
        thread.wait();
    }
}
#ifdef ENABLE_WALLET
void RPCConsole::addWallet(WalletModel * const walletModel)