Xaml cleanup

Samples/AudioPreprocessing/WinUI/AudioPreprocessing/AudioPreprocessing/MainWindow.xaml

@@ -12,15 +12,16 @@
     mc:Ignorable="d">
 
     <StackPanel Background="White" Orientation="Vertical">
-
         <Button Name="ShowFilePickerButton" Content="Open file" HorizontalAlignment="Center" Click = "OnOpenClick"
         VerticalAlignment="Center" />
-        <CheckBox x:Name = "ColorMelSpectrogramCheckBox" Margin = "10" Content = "Check to render Mel Spectrogram with color" HorizontalAlignment="Center"/>
+        <CheckBox x:Name = "ColorMelSpectrogramCheckBox"  Content = "Check to render Mel Spectrogram with color" HorizontalAlignment="Center"/>
+        <TextBlock Name="WavFilePath" Text="{x:Bind ViewModel.AudioPath}" 
+                   HorizontalAlignment="Center" VerticalAlignment="Center" />
         
-        <TextBlock Name="WavFilePath" Text="{x:Bind ViewModel.AudioPath}" HorizontalAlignment="Center" VerticalAlignment="Center" />
-        <Button Name="SaveFilebutton" Command="{x:Bind ViewModel.SaveFileCommand}" Content="Save file" HorizontalAlignment="Center"
-            VerticalAlignment="Center" />
-        <TextBlock Name="ImagePath" Text="{x:Bind ViewModel.ImagePath}" HorizontalAlignment="Center" VerticalAlignment="Center" />
+        <Button Name="SaveFilebutton" Command="{x:Bind ViewModel.SaveFileCommand}" Content="Save file" 
+                HorizontalAlignment="Center" VerticalAlignment="Center" />
+        <TextBlock Name="ImagePath" Text="{x:Bind ViewModel.ImagePath}" 
+                   HorizontalAlignment="Center" VerticalAlignment="Center"  />
 
         <StackPanel HorizontalAlignment="Center" Background="White" Orientation="Horizontal">
             <Image Name="spectrogram" Stretch="Fill" Height="500" Width="500" />