Saving workspace on mac doesn't add the .pyns extension

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Save a workspace
2. Type a name but don't add the .pyns extension
3. Try opening the file later

What is the expected output? What do you see instead?

You see the files but they are dimmed since they don't match the *.pyns

What version of the product are you using? On what operating system?

Mac Lion 

Please provide any additional information below.

Double check this issue on windows and linux.

Original issue reported on code.google.com by [email protected] on 23 Apr 2013 at 7:43