[DW15] Change the name pattern of "_notes" to ".notes"?

Mostly I use DW to manage files locally, but for serious manipulations I prefer to use my fully featured file manager.

In the filemanager - of course - I see the subfolders "_notes".

I would like to hide them. The easiest way would be to change the name pattern from "_notes" to ".notes", because by default all files/folders which beginn with a "." are hidden (in the filemanager).

Is it possible to configure DW to change the name pattern?

Thanks.