Code Quality: Moved toolbar background to MainPage (#15451)

Author: yaira2

src/Files.App/UserControls/SideBar/SideBarView.xaml

@@ -140,14 +140,8 @@
 			<Border
 				x:Name="ContentHeaderPresenter"
 				Grid.Row="0"
-				Margin="0,0,0,4"
-				VerticalAlignment="Stretch"
-				Background="{ThemeResource App.Theme.Toolbar.BackgroundBrush}"
-				BackgroundSizing="InnerBorderEdge"
-				BorderBrush="{ThemeResource CardStrokeColorDefaultBrush}"
-				BorderThickness="1"
-				Child="{x:Bind ContentHeader, Mode=OneWay}"
-				CornerRadius="8"
+				VerticalAlignment="Stretch"				
+				Child="{x:Bind ContentHeader, Mode=OneWay}"				
 				TabFocusNavigation="Local" />
 
 			<!--  Content  -->

src/Files.App/Views/MainPage.xaml

@@ -217,7 +217,13 @@
 
 			<!--  Content Header  -->
 			<sidebar:SidebarView.ContentHeader>
-				<Border>
+				<Border
+					Margin="0,0,0,4"
+					Background="{ThemeResource App.Theme.Toolbar.BackgroundBrush}"
+					BackgroundSizing="InnerBorderEdge"
+					BorderBrush="{ThemeResource CardStrokeColorDefaultBrush}"
+					BorderThickness="1"
+					CornerRadius="8">
 					<!--  File Navigation Toolbar  -->
 					<uc:InnerNavigationToolbar
 						x:Name="InnerNavigationToolbar"