improve handling of deleted images

MediaBrowser.Providers/Folders/DefaultImageProvider.cs

@@ -170,4 +170,4 @@ namespace MediaBrowser.Providers.Folders
             return GetSupportedImages(item).Any(i => !item.HasImage(i));
         }
     }
-}
+}

MediaBrowser.Providers/Manager/ItemImageProvider.cs

@@ -359,12 +359,13 @@ namespace MediaBrowser.Providers.Manager
         private void ClearImages(IHasImages item, ImageType type)
         {
             var deleted = false;
+            var deletedImages = new List<ItemImageInfo>();
 
             foreach (var image in item.GetImages(type).ToList())
             {
                 if (!image.IsLocalFile)
                 {
-                    // TODO: Need to get this image removed
+                    deletedImages.Add(image);
                     continue;
                 }
 
@@ -384,6 +385,11 @@ namespace MediaBrowser.Providers.Manager
                 }
             }
 
+            foreach (var image in deletedImages)
+            {
+                item.RemoveImage(image);
+            }
+
             if (deleted)
             {
                 item.ValidateImages(new DirectoryService(_logger, _fileSystem));

MediaBrowser.Providers/Subtitles/SubtitleManager.cs

@@ -15,6 +15,7 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using CommonIO;
@@ -130,6 +131,8 @@ namespace MediaBrowser.Providers.Subtitles
 
                     try
                     {
+                        //var isText = MediaStream.IsTextFormat(response.Format);
+
                         using (var fs = _fileSystem.GetFileStream(savePath, FileMode.Create, FileAccess.Write, FileShare.Read, true))
                         {
                             await stream.CopyToAsync(fs).ConfigureAwait(false);