Reverts using resource by 'd8604567eec0445e2898a78437b5016b021a2cd4'

src/Avalonia.Themes.Default/Window.xaml

@@ -1,9 +1,8 @@
 <Style xmlns="https://github.com/avaloniaui" Selector="Window">
-  <Setter Property="Background" Value="{DynamicResource SystemControlBackgroundAltHighBrush}"/>  
-  <Setter Property="TransparencyBackgroundFallback" Value="{DynamicResource SystemControlBackgroundAltHighBrush}" />
-  <Setter Property="Foreground" Value="{DynamicResource SystemControlForegroundBaseHighBrush}"/>
-  <Setter Property="FontSize" Value="{DynamicResource ContentControlFontSize}"/>  
-  <Setter Property="FontFamily" Value="{DynamicResource ContentControlThemeFontFamily}" />
+  <Setter Property="Background" Value="{DynamicResource ThemeBackgroundBrush}"/>  
+  <Setter Property="TransparencyBackgroundFallback" Value="{DynamicResource HighlightForegroundColor}" />
+  <Setter Property="Foreground" Value="{DynamicResource ThemeForegroundBrush}"/>
+  <Setter Property="FontSize" Value="{DynamicResource FontSizeSmall}"/>  
   <Setter Property="Template">
     <ControlTemplate>
       <Panel>