Code Quality: Fixed an issue where the fix in #17335 didn't work (#17337)

Author: hishitetsu

src/Files.App/UserControls/FilePreviews/MediaPreview.xaml.cs

@@ -17,7 +17,6 @@ public MediaPreview(MediaPreviewViewModel model)
 			ViewModel = model;
 			InitializeComponent();
 			PlayerContext.Loaded += PlayerContext_Loaded;
-			PlayerContext.Unloaded += PlayerContext_Unloaded;
 			Unloaded += MediaPreview_Unloaded;
 		}
 
@@ -30,21 +29,17 @@ private void PlayerContext_Loaded(object sender, RoutedEventArgs e)
 			ViewModel.TogglePlaybackRequested += TogglePlaybackRequestInvoked;
 		}
 
-		private void PlayerContext_Unloaded(object sender, RoutedEventArgs e)
-		{
-			PlayerContext.MediaPlayer.VolumeChanged -= MediaPlayer_VolumeChanged;
-			ViewModel.TogglePlaybackRequested -= TogglePlaybackRequestInvoked;
-		}
-
 		private void MediaPreview_Unloaded(object sender, RoutedEventArgs e)
 		{
 			// The MediaPlayerElement isn't properly disposed by Windows so we set the source to null
 			// to avoid issues the next time the control is used.
 			PlayerContext.Source = null;
 
 			PlayerContext.Loaded -= PlayerContext_Loaded;
-			PlayerContext.Unloaded -= PlayerContext_Unloaded;
 			Unloaded -= MediaPreview_Unloaded;
+
+			PlayerContext.MediaPlayer.VolumeChanged -= MediaPlayer_VolumeChanged;
+			ViewModel.TogglePlaybackRequested -= TogglePlaybackRequestInvoked;
 		}
 
 		private void MediaPlayer_VolumeChanged(MediaPlayer sender, object args)