fix: Shadow colors are no longer solid black

src/library/Uno.Cupertino/Styles/Controls/DatePicker.xaml

@@ -106,7 +106,7 @@
 										  BorderThickness="{TemplateBinding BorderThickness}"
 										  CornerRadius="{TemplateBinding CornerRadius}"
 										  Elevation="{StaticResource MaterialDatePickerFlyoutElevation}"
-										  ShadowColor="Black">
+										  ShadowColor="{StaticResource ShadowColor}">
 						<Border x:Name="Background">
 							<Grid x:Name="ContentPanel">
 

src/library/Uno.Material/Styles/Controls/v1/DatePicker.xaml

@@ -108,7 +108,7 @@
 										  BorderThickness="{TemplateBinding BorderThickness}"
 										  CornerRadius="{TemplateBinding CornerRadius}"
 										  Elevation="{StaticResource MaterialDatePickerFlyoutElevation}"
-										  ShadowColor="Black">
+										  ShadowColor="{StaticResource ShadowColor}">
 						<Border x:Name="Background">
 							<Grid x:Name="ContentPanel">
 

src/library/Uno.Material/Styles/Controls/v1/ToggleSwitch.xaml

@@ -379,7 +379,7 @@
 												   Height="20"
 												   Elevation="4"
 												   CornerRadius="10"
-												   ShadowColor="Black"
+												   ShadowColor="{StaticResource ShadowColor}"
 												   Background="Transparent"
 												   VerticalAlignment="Stretch"
 												   HorizontalAlignment="Stretch">

src/library/Uno.Material/Styles/Controls/v2/DatePicker.xaml

@@ -190,7 +190,7 @@
 										  BorderThickness="{TemplateBinding BorderThickness}"
 										  CornerRadius="{TemplateBinding CornerRadius}"
 										  Elevation="{ThemeResource DatePickerFlyoutElevation}"
-										  ShadowColor="Black">
+										  ShadowColor="{StaticResource ShadowColor}">
 						<Border x:Name="Background">
 							<Grid x:Name="ContentPanel">