chore: Adjust flyout height

Author: eriklimakc

UI/Navigation/src/Navigation/Presentation/ModalDialog/ComplexFlyoutPage.xaml

@@ -8,7 +8,7 @@
 		xmlns:utu="using:Uno.Toolkit.UI"
 		mc:Ignorable="d">
 
-	<Grid Width="500" Height="1000">
+	<Grid Width="500" Height="500">
 		<Frame HorizontalAlignment="Stretch"
 			   VerticalAlignment="Stretch"
 			   HorizontalContentAlignment="Stretch"