Incorrect use of DisableMediaInsertionPrompt

Unless I'm very much confused, it appears that the FileSystemEnumerator constructor uses DisableMediaInsertionPrompt incorrectly such that it will do nothing because it calls 'new DisableMediaInsertionPrompt()' instead of DisableMediaInsertionPrompt.Create().

I just happened to notice this while scrolling through the code. I don't know exactly in which situations the undesirable media prompt would occur and don't have a particular need for this to be fixed.