Created Unassigned: Files created through context menu have empty alternate stream [9653]

File types with assigned FileMeta handler (checked up to v1.3) have very annoying issue: when you create file through 'New' item in context menu, this newly created file have empty alternate stream with {4c8cc155-6c1e-11d1-8e41-00c04fb9386d} name, and therefore specific icon overlay on systems with [AltStreamOverlay](http://www.benf.org/other/alternatestreamoverlay/index.html) shell extension installed.

Thank you for great software!