Fix: Fixed high contrast support in the Properties window (#12862)

Author: yaira2

src/Files.App/App.xaml

@@ -26,16 +26,6 @@
 			<CornerRadius x:Key="GridViewThumbnailCornerRadius">2</CornerRadius>
 			<CornerRadius x:Key="DetailsLayoutThumbnailCornerRadius">2</CornerRadius>
 
-			<LinearGradientBrush x:Key="ControlElevationBorderBrush" MappingMode="Absolute" StartPoint="0,0" EndPoint="0,3">
-				<LinearGradientBrush.RelativeTransform>
-					<ScaleTransform CenterY="0.5" ScaleY="-1" />
-				</LinearGradientBrush.RelativeTransform>
-				<LinearGradientBrush.GradientStops>
-					<GradientStop Offset="0" Color="{ThemeResource ControlStrokeColorSecondary}" />
-					<GradientStop Offset="1.0" Color="{ThemeResource ControlStrokeColorDefault}" />
-				</LinearGradientBrush.GradientStops>
-			</LinearGradientBrush>
-
 			<ResourceDictionary.MergedDictionaries>
 				<XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" />
 				<ResourceDictionary Source="/ResourceDictionaries/PathIcons.xaml" />

src/Files.App/ResourceDictionaries/NavigationViewItemButtonStyle.xaml

@@ -7,6 +7,30 @@
 	xmlns:primitives="using:Microsoft.UI.Xaml.Controls.Primitives">
 
 	<ResourceDictionary.ThemeDictionaries>
+		<ResourceDictionary x:Key="Light">
+			<StaticResource x:Key="NavigationViewItemBackgroundPointerOver" ResourceKey="ControlFillColorSecondaryBrush" />
+			<StaticResource x:Key="NavigationViewItemBackgroundPressed" ResourceKey="ControlFillColorTertiaryBrush" />
+			<StaticResource x:Key="NavigationViewItemBackgroundSelected" ResourceKey="ControlFillColorDefaultBrush" />
+			<StaticResource x:Key="NavigationViewItemBackgroundSelectedPointerOver" ResourceKey="ControlFillColorDefaultBrush" />
+			<StaticResource x:Key="NavigationViewItemBackgroundSelectedPressed" ResourceKey="ControlFillColorDefaultBrush" />
+
+			<StaticResource x:Key="NavigationViewItemForeground" ResourceKey="TextFillColorPrimaryBrush" />
+			<StaticResource x:Key="NavigationViewItemForegroundPointerOver" ResourceKey="TextFillColorPrimaryBrush" />
+			<StaticResource x:Key="NavigationViewItemForegroundPressed" ResourceKey="TextFillColorPrimaryBrush" />
+			<StaticResource x:Key="NavigationViewItemForegroundSelected" ResourceKey="TextFillColorPrimaryBrush" />
+			<StaticResource x:Key="NavigationViewItemForegroundSelectedPointerOver" ResourceKey="TextFillColorPrimaryBrush" />
+			<StaticResource x:Key="NavigationViewItemForegroundSelectedPressed" ResourceKey="TextFillColorPrimaryBrush" />
+
+			<StaticResource x:Key="NavigationViewItemBorderBrush" ResourceKey="ControlFillColorTransparentBrush" />
+			<StaticResource x:Key="NavigationViewItemBorderBrushPointerOver" ResourceKey="ControlElevationBorderBrush" />
+			<StaticResource x:Key="NavigationViewItemBorderBrushPressed" ResourceKey="ControlStrokeColorDefaultBrush" />
+			<StaticResource x:Key="NavigationViewItemBorderBrushDisabled" ResourceKey="ControlStrokeColorDefaultBrush" />
+			<StaticResource x:Key="NavigationViewItemBorderBrushSelected" ResourceKey="ControlElevationBorderBrush" />
+			<StaticResource x:Key="NavigationViewItemBorderBrushSelectedPointerOver" ResourceKey="ControlStrokeColorDefaultBrush" />
+			<StaticResource x:Key="NavigationViewItemBorderBrushSelectedPressed" ResourceKey="ControlStrokeColorDefaultBrush" />
+			<StaticResource x:Key="NavigationViewItemBorderBrushSelectedDisabled" ResourceKey="ControlStrokeColorDefaultBrush" />
+		</ResourceDictionary>
+
 		<ResourceDictionary x:Key="Dark">
 			<StaticResource x:Key="NavigationViewItemBackgroundPointerOver" ResourceKey="ControlFillColorSecondaryBrush" />
 			<StaticResource x:Key="NavigationViewItemBackgroundPressed" ResourceKey="ControlFillColorTertiaryBrush" />
@@ -31,7 +55,7 @@
 			<StaticResource x:Key="NavigationViewItemBorderBrushSelectedDisabled" ResourceKey="ControlStrokeColorDefaultBrush" />
 		</ResourceDictionary>
 
-		<ResourceDictionary x:Key="Light">
+		<ResourceDictionary x:Key="HighContrast">
 			<StaticResource x:Key="NavigationViewItemBackgroundPointerOver" ResourceKey="ControlFillColorSecondaryBrush" />
 			<StaticResource x:Key="NavigationViewItemBackgroundPressed" ResourceKey="ControlFillColorTertiaryBrush" />
 			<StaticResource x:Key="NavigationViewItemBackgroundSelected" ResourceKey="ControlFillColorDefaultBrush" />