Improved: ConfigService now clones ItemsByFolder to avoid issues with…

… concurrent access

source/Reloaded.Mod.Loader.IO/Services/ConfigServiceBase.cs

@@ -188,7 +188,7 @@ private void OnDeleteDirectory(object sender, FileSystemEventArgs e)
         // Otherwise iterate over all possible subfolders.
         // This is a bit inefficient, but with nested mods, it's the only way (without creating a whole tree of nodes).
         // Can rack up upwards of 20ms in huge mod directories.
-        foreach (var item in ItemsByFolder)
+        foreach (var item in ItemsByFolder.ToArray())
         {
             var modFolder = item.Key;
             if (!Path.EndsInDirectorySeparator(modFolder))