Feature: Updated the DataGrid header design (#12907)

Author: yaira2

src/Files.App/UserControls/DataGridHeader.xaml

@@ -14,9 +14,8 @@
 			BasedOn="{StaticResource DefaultButtonStyle}"
 			TargetType="Button">
 			<Setter Property="CornerRadius" Value="0" />
-			<Setter Property="BorderBrush" Value="Transparent" />
+			<Setter Property="BorderThickness" Value="0" />
 			<Setter Property="HorizontalContentAlignment" Value="Stretch" />
-			<Setter Property="Height" Value="34" />
 			<Setter Property="HorizontalAlignment" Value="Stretch" />
 			<Setter Property="VerticalAlignment" Value="Stretch" />
 			<Setter Property="Background">
@@ -26,7 +25,7 @@
 			</Setter>
 		</Style>
 
-		<x:String x:Key="SortIconAscending">&#xE70E;</x:String>
+		<x:String x:Key="SortIconAscending">&#xEDDB;</x:String>
 	</UserControl.Resources>
 
 	<Grid>
@@ -48,7 +47,8 @@
 					Grid.ColumnSpan="2"
 					HorizontalAlignment="{x:Bind HorizontalContentAlignment}"
 					FontSize="12"
-					Foreground="{ThemeResource SystemControlForegroundBaseMediumBrush}"
+					FontWeight="SemiBold"
+					Foreground="{ThemeResource TextFillColorTertiaryBrush}"
 					Text="{x:Bind Header, Mode=OneWay}"
 					TextTrimming="CharacterEllipsis" />
 				<FontIcon
@@ -57,8 +57,8 @@
 					HorizontalAlignment="Center"
 					VerticalAlignment="Center"
 					FontFamily="{ThemeResource SymbolThemeFontFamily}"
-					FontSize="12"
-					Foreground="{ThemeResource SystemControlForegroundBaseMediumBrush}"
+					FontSize="8"
+					Foreground="{ThemeResource TextFillColorTertiaryBrush}"
 					Glyph="{StaticResource SortIconAscending}"
 					RenderTransformOrigin="0.5, 0.5"
 					Visibility="Collapsed">

src/Files.App/Views/LayoutModes/DetailsLayoutBrowser.xaml

@@ -55,7 +55,7 @@
 				TargetType="toolkit:GridSplitter">
 				<Setter Property="Background" Value="Transparent" />
 				<Setter Property="Width" Value="12" />
-				<Setter Property="Margin" Value="0,4,0,4" />
+				<Setter Property="Margin" Value="0" />
 				<Setter Property="Opacity" Value="0.8" />
 				<Setter Property="Canvas.ZIndex" Value="1" />
 			</Style>