Changed cancel button of ProgressForm to be Light Yellow instead of Transparent

inabox.wpf/ProgressWindow/ProgressForm.xaml

@@ -52,7 +52,7 @@
                 Background="Transparent" />
 
             <Button x:Name="CancelButton" Style="{StaticResource RoundButton}"
-                    Background="Transparent"
+                    Background="LightYellow"
                     Content="{Binding ElementName=Window,Path=CancelText}"
                     Visibility="{Binding ElementName=Window,Path=CancelButtonVisibility}"
                     Padding="5" Margin="5"