Fix flicker on resize under D2D.
Fix flicker on resize under D2D.

Still getting a "rubber banding" effect that needs to be fixed though.

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