Minor fix

Author: mgesing

src/Presentation/SmartStore.Web/Administration/Models/News/NewsItemModel.cs

@@ -42,7 +42,7 @@ public NewsItemModel()
         public int? PictureId { get; set; }
 
         [UIHint("Media"), AdditionalMetadata("album", "content")]
-        [SmartResourceDisplayName("Admin.ContentManagement.News.NewsItems.Fields.PreviewPictureId")]
+        [SmartResourceDisplayName("Admin.ContentManagement.News.NewsItems.Fields.PreviewPicture")]
         public int? PreviewPictureId { get; set; }
 
         [SmartResourceDisplayName("Admin.ContentManagement.News.NewsItems.Fields.AllowComments")]