Test fix for ListDetailsView

Author: michael-hawker

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/ListDetailsView/ListDetailsView.bind

@@ -16,13 +16,13 @@
                 <DataTemplate>
                     <StackPanel Margin="0,8">
                         <TextBlock Text="{Binding From}"
-                                   Style="{ThemeResource SubtitleTextBlockStyle}"/>
+                                   Style="{StaticResource SubtitleTextBlockStyle}"/>
                         <TextBlock Text="{Binding Subject}"
-                                   Style="{ThemeResource BodyTextBlockStyle}"
+                                   Style="{StaticResource BodyTextBlockStyle}"
                                    Foreground="{ThemeResource Brush-Blue-01}"
                                    MaxLines="1"/>
                         <TextBlock Text="{Binding Body}"
-                                   Style="{ThemeResource BodyTextBlockStyle}"
+                                   Style="{StaticResource BodyTextBlockStyle}"
                                    Opacity=".6"
                                    MaxLines="1"/>
                     </StackPanel>
@@ -37,17 +37,17 @@
                                                Height="50"
                                                CornerRadius="999"/>
                         <TextBlock Text="{Binding From}"
-                                   Style="{ThemeResource SubtitleTextBlockStyle}"
+                                   Style="{StaticResource SubtitleTextBlockStyle}"
                                    RelativePanel.RightOf="FromEllipse"
                                    Margin="12,-6,0,0"/>
                         <TextBlock x:Name="SubjectLine"
                                    Text="{Binding Subject}"
-                                   Style="{ThemeResource BodyTextBlockStyle}"
+                                   Style="{StaticResource BodyTextBlockStyle}"
                                    RelativePanel.Below="FromEllipse"
                                    Margin="0,12,0,0"/>
                         <TextBlock x:Name="Body"
                                    Text="{Binding Body}"
-                                   Style="{ThemeResource BodyTextBlockStyle}"
+                                   Style="{StaticResource BodyTextBlockStyle}"
                                    TextWrapping="Wrap"
                                    RelativePanel.Below="SubjectLine"
                                    Margin="0,12,0,0"/>