Minor UI tweaks

Author: Sergio0694

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/Loading/LoadingCode.bind

@@ -66,7 +66,7 @@
         <brushes:AcrylicBrush BackgroundSource="Backdrop"
                               TintColor="Black"
                               TintOpacity="@[Opacity:DoubleSlider:0.4:0.0-1.0]"
-                              BlurAmount="@[BlurAmount:DoubleSlider:8:0.0-32.0]"/>
+                              BlurAmount="@[BlurAmount:DoubleSlider:8:0.0-24.0]"/>
       </controls:Loading.Background>
       <ContentControl x:Name="LoadingContentControl" />
     </controls:Loading>

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/Loading/LoadingPage.xaml.cs

@@ -67,7 +67,7 @@ private void Load()
         private async Task ShowLoadingDialogAsync()
         {
             loadingControl.IsLoading = true;
-            await Task.Delay(3000);
+            await Task.Delay(5000);
             loadingControl.IsLoading = false;
         }
     }