On Fedora 29.1-2, when running `bitcoin-qt -regtest`, the name of the application in the menu bar is shown as `Bitcoin-Qt-testnet` (the icon is the correct blue colour). i.e:
![fedora - notifications](https://user-images.githubusercontent.com/863730/50596726-23f17280-0ee0-11e9-9083-31c8baf62feb.png)


Noticed while testing #15000 (confirmed unrelated by testing master). When running just `bitcoin-qt`, or passing `-testnet` the menu name and icon are both correct.
appName(_appName),
    titleAddText(qApp->translate("SplashScreen", _titleAddText))
{
    
    QPixmap pixmap(":/icons/bitcoin");
    if(iconColorHueShift != 0 && iconColorSaturationReduction != 0)
    {
        
        QImage img = pixmap.toImage();
        int h,s,l,a;
        
        for(int y=0;y<img.height();y++)
        {
            QRgb *scL = reinterpret_cast< QRgb *>( img.scanLine( y ) );
            
            for(int x=0;x<img.width();x++)
            {
                
                a = qAlpha(scL[x]);
                QColor col(scL[x]);
                
                col.getHsl(&h,&s,&l);
                
                
                h+=iconColorHueShift;
                /
                if(s>iconColorSaturationReduction)