lot of small fixes for dataset explorer

Azaion.Annotator/DTO/PlaybackControlEnum.cs

@@ -14,5 +14,6 @@ public enum PlaybackControlEnum
     TurnOffVolume = 9,
     TurnOnVolume = 10,
     Previous = 11,
-    Next = 12
+    Next = 12,
+    Close = 13
 }

Azaion.Annotator/DTO/ThumbnailDto.cs

@@ -1,6 +1,7 @@
 using System.ComponentModel;
 using System.Runtime.CompilerServices;
 using System.Windows.Media.Imaging;
+using Azaion.Annotator.Extensions;
 
 namespace Azaion.Annotator.DTO;
 
@@ -16,7 +17,7 @@ public class ThumbnailDto : INotifyPropertyChanged
         get
         {
             if (_image == null)
-                LoadImageAsync();
+                Task.Run(async () => Image = await ThumbnailPath.OpenImage());
             return _image;
         }
         set
@@ -26,28 +27,7 @@ public class ThumbnailDto : INotifyPropertyChanged
         }
     }
 
-    private async void LoadImageAsync()
-    {
-        await Task.Run(() =>
-        {
-            try
-            {
-                var bitmap = new BitmapImage();
-                bitmap.BeginInit();
-                bitmap.UriSource = new Uri(ThumbnailPath);
-                bitmap.CacheOption = BitmapCacheOption.OnLoad;
-                bitmap.DecodePixelWidth = 480;
-                bitmap.DecodePixelHeight = 270;
-                bitmap.EndInit();
-                bitmap.Freeze(); // Freeze to make it cross-thread accessible
-                Image = bitmap;
-            }
-            catch (Exception e)
-            {
-                Console.WriteLine(e);
-            }
-        });
-    }
+    public void UpdateImage() => _image = null;
 
     public event PropertyChangedEventHandler? PropertyChanged;
     protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)