Generating VSS Source Code stubs duplicates public class properties

[spanky762]

Describe the bug
If existing library vss code exists, and there is an existing class in the code, and that class has public properties, then generating source code stubs will duplicate the property stub code.

Area Affected
[ ] VoltScript Interface Designer NSF - Extension Projects
[X] VoltScript Interface Designer NSF - Script Library Projects
[X] Code Generation
[ ] API Doc Generation
[ ] Documentation
[ ] Extension Samples
[ ] Script Library Samples

To Reproduce
Steps to reproduce the behavior:

1. Create script library documents with a class, and add 2 or more public properties to the class.
2. Generate the source code.
3. Add implementation code to the generated source.
4. Regenerate the code.

Expected behavior
Properties will not be duplicated.

Platform (please complete the following information):

• Windows
• Notes Client Version 12.0.2 and above.
• 64-Bit