### 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->mempoolNumberTxs->setText(QString::number(numberOfTxs));
    if (dynUsage < 1000000)
        ui->mempoolSize->setText(QString::number(dynUsage/1000.0, 'f', 2) + " KB");
    else
        ui->mempoolSize->setText(QString::number(dynUsage/1000000.0, 'f', 2) + " MB");
}
void RPCConsole::on_lineEdit_returnPressed()
{
    QString cmd = ui->lineEdit->text();
    if(!cmd.isEmpty())
    {
        std::string strFilteredCmd;
        try {
            std::string dummy;
            if (!RPCParseCommandLine(nullptr, dummy, cmd.toStdString(), false, &strFilteredCmd)) {
                // F
                throw std::runtime_error("Invalid command line");
            }
        } catch (const std::exception& e) {
            QMessageBox::critical(this, "Error", QString("Error: ") + QString::fromStdString(e.what()));
            return;
        }
        ui->lineEdit->clear();
        cmdBeforeBrowsing = QString();
        QString walletID;
#ifdef ENABLE_WALLET