keep control catalog on old theme for now.

samples/ControlCatalog/App.xaml

@@ -2,10 +2,9 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              x:Class="ControlCatalog.App">
   <Application.Styles>
-    <StyleInclude Source="resm:Avalonia.Themes.Default.Accents.BaseDark.xaml?assembly=Avalonia.Themes.Default" />
-    <StyleInclude Source="avares://Avalonia.Themes.Fluent/Accents/FluentDark.xaml"/>
-    <StyleInclude Source="avares://Avalonia.Themes.Fluent/FluentTheme.xaml"/>
-    <StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Default.xaml"/>
+    <StyleInclude Source="avares://Avalonia.Themes.Default/DefaultTheme.xaml"/>
+    <StyleInclude Source="avares://Avalonia.Themes.Default/Accents/BaseLight.xaml"/>
+    <StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Default.xaml"/>    
     <Style Selector="TextBlock.h1">
       <Setter Property="FontSize" Value="{DynamicResource FontSizeLarge}"/>
       <Setter Property="FontWeight" Value="Medium"/>