Revert theme changes and fix menu bar high contrast support

Co-authored-by: brianrob <6210322+brianrob@users.noreply.github.com>

Author: Copilot

src/PerfView/MainWindow.xaml

@@ -72,7 +72,7 @@
                 <ColumnDefinition Width="Auto"/>
                 <ColumnDefinition Width="Auto"/>
             </Grid.ColumnDefinitions>
-            <Menu Grid.Column="0" Background="{DynamicResource ControlDefaultBackground}" AutomationProperties.Name="Navigation">
+            <Menu Grid.Column="0" Background="{DynamicResource {x:Static SystemColors.MenuBarBrushKey}}" AutomationProperties.Name="Navigation">
                 <MenuItem Header="_File">
                     <MenuItem Header="_Clear Temp Files" Click="DoClearTempFiles" ToolTip="Some operations create temporary files.  This command clears all of these."/>
                     <MenuItem Header="Clear User Config" Click="DoClearUserConfig" ToolTip="Reset all user preferences back to their defaults when PerfView was first installed."/>
@@ -149,7 +149,7 @@
                     <MenuItem Header="_About" Click="DoAbout"/>
                 </MenuItem>
             </Menu>
-            <Rectangle Grid.Column="1" Grid.ColumnSpan="11" Fill="{DynamicResource ControlDefaultBackground}"/>
+            <Rectangle Grid.Column="1" Grid.ColumnSpan="11" Fill="{DynamicResource {x:Static SystemColors.MenuBarBrushKey}}"/>
             <TextBlock Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center"  Margin="3,0" TextWrapping="Wrap">
                 <Hyperlink Command="Help" CommandParameter="MainViewerQuickStart">Main View Help (F1)</Hyperlink>
             </TextBlock>

src/PerfView/Themes/DarkTheme.xaml

@@ -2205,14 +2205,10 @@ SOFTWARE.
                 <Setter Property="OverridesDefaultStyle" Value="true" />
             </Style>
             <Style x:Key="{x:Type Hyperlink}" BasedOn="{StaticResource {x:Type Hyperlink}}" TargetType="{x:Type Hyperlink}">
-                <Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}" />
                 <Style.Triggers>
                     <Trigger Property="IsMouseOver" Value="true">
                         <Setter Property="Foreground" Value="{StaticResource ControlBrightPrimaryColourBackground}" />
                     </Trigger>
-                    <Trigger Property="IsFocused" Value="true">
-                        <Setter Property="Foreground" Value="{StaticResource ControlBrightPrimaryColourBackground}" />
-                    </Trigger>
                     <Trigger Property="IsEnabled" Value="false">
                         <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
                     </Trigger>
@@ -2224,14 +2220,10 @@ SOFTWARE.
     <Style x:Key="{x:Type Hyperlink}" TargetType="{x:Type Hyperlink}">
         <Setter Property="Foreground" Value="{StaticResource ControlDefaultForeground}" />
         <Setter Property="TextDecorations" Value="Underline" />
-        <Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}" />
         <Style.Triggers>
             <Trigger Property="IsMouseOver" Value="true">
                 <Setter Property="Foreground" Value="{StaticResource ControlBrightPrimaryColourBackground}" />
             </Trigger>
-            <Trigger Property="IsFocused" Value="true">
-                <Setter Property="Foreground" Value="{StaticResource ControlBrightPrimaryColourBackground}" />
-            </Trigger>
             <Trigger Property="IsEnabled" Value="false">
                 <Setter Property="Foreground" Value="{StaticResource ControlDisabledGlythColour}" />
             </Trigger>

src/PerfView/Themes/LightTheme.xaml

@@ -85,9 +85,9 @@ SOFTWARE.
     <SolidColorBrush x:Key="Menu.Static.Separator" Color="#FFD7D7D7"/>
     <SolidColorBrush x:Key="Menu.Disabled.Foreground" Color="#FF707070"/>
     <SolidColorBrush x:Key="MenuItem.Selected.Background" Color="#3D26A0DA"/>
-    <SolidColorBrush x:Key="MenuItem.Selected.Border" Color="#FF1F4E79"/>
+    <SolidColorBrush x:Key="MenuItem.Selected.Border" Color="#FF2084E8"/>
     <SolidColorBrush x:Key="MenuItem.Highlight.Background" Color="#3D26A0DA"/>
-    <SolidColorBrush x:Key="MenuItem.Highlight.Border" Color="#FF1F4E79"/>
+    <SolidColorBrush x:Key="MenuItem.Highlight.Border" Color="#FF2084E8"/>
     <SolidColorBrush x:Key="MenuItem.Highlight.Disabled.Background" Color="#0A000000"/>
     <SolidColorBrush x:Key="MenuItem.Highlight.Disabled.Border" Color="#21000000"/>
     <MenuScrollingVisibilityConverter x:Key="MenuScrollingVisibilityConverter"/>