Fixed ScrollViewer background correctly.
Fixed ScrollViewer background correctly.

Removed it from the wrong place in the previous commit.

jkoritzinsky/Avalonia,jkoritzinsky/Avalonia,jkoritzinsky/Avalonia,AvaloniaUI/Avalonia,AvaloniaUI/Avalonia,AvaloniaUI/Avalonia,SuperJMN/Avalonia,SuperJMN/Avalonia,SuperJMN/Avalonia,SuperJMN/Avalonia,Perspex/Perspex,grokys/Perspex,jkoritzinsky/Avalonia,wieslawsoltes/Perspex,grokys/Perspex,wieslawsoltes/Perspex,wieslawsoltes/Perspex,wieslawsoltes/Perspex,SuperJMN/Avalonia,wieslawsoltes/Perspex,wieslawsoltes/Perspex,SuperJMN/Avalonia,AvaloniaUI/Avalonia,AvaloniaUI/Avalonia,jkoritzinsky/Avalonia,jkoritzinsky/Avalonia,akrisiun/Perspex,wieslawsoltes/Perspex,jkoritzinsky/Avalonia,SuperJMN/Avalonia,jazzay/Perspex,jkoritzinsky/Perspex,MrDaedra/Avalonia,AvaloniaUI/Avalonia,AvaloniaUI/Avalonia,MrDaedra/Avalonia,Perspex/Perspex