### 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)

TabTypes tabFocus() const;
    QString tabTitle(TabTypes tab_type) const;
protected:
    virtual bool eventFilter(QObject* obj, QEvent *event);
    void keyPressEvent(QKeyEvent *);
private Q_SLOTS:
    void on_lineEdit_returnPressed();
    void on_tabWidget_currentChanged(int index);
    
    void on_openDebugLogfileButton_clicked();
    
    void on_sldGraphRange_valueChanged(int value);
    
    void updateTrafficStats(quint64 totalBytesIn, quint64 totalBytesOut);
    void resizeEvent(QResizeEvent *event);
    void showEvent(QShowEvent *event);
    void hideEvent(QHideEvent *event);
    
    void showPeersTableContextMenu(const QPoint& point);
    
    void showBanTableContextMenu(const QPoint& point);
    
    void showOrHideBanTableIfRequired();
    
    void clearSelectedNode();
public Q_SLOTS:
    void clear(bool clearHistory = true);
    void fontBigger();
    void fontSmaller();