add js local asset manager

MediaBrowser.Server.Implementations/IO/LibraryMonitor.cs

@@ -81,10 +81,10 @@ namespace MediaBrowser.Server.Implementations.IO
                 throw new ArgumentNullException("path");
             }
 
-            // This is an arbitraty amount of time, but delay it because file system writes often trigger events after RemoveTempIgnore has been called. 
+            // This is an arbitraty amount of time, but delay it because file system writes often trigger events long after the file was actually written to.
             // Seeing long delays in some situations, especially over the network, sometimes up to 45 seconds
-            // But if we make this delay too high, we risk missing legitimate changes
-            await Task.Delay(15000).ConfigureAwait(false);
+            // But if we make this delay too high, we risk missing legitimate changes, such as user adding a new file, or hand-editing metadata
+            await Task.Delay(20000).ConfigureAwait(false);
 
             string val;
             _tempIgnoredPaths.TryRemove(path, out val);