[Bug] IronPython - 'import csv' fails in Script Manager

[rcroy]

Describe the bug
When calling 'import csv' in a script for IronPython in the Script Manager, it fails with the following error:

Error	Error running script '': Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named csv

But in the Interactive IronPython, 'import csv' works fine.

To Reproduce
Steps to reproduce the behavior:

1. Open the Classic UI version of DWSIM
2. Open the 'Dynamic Simultion - Water Tank Level Control' sample
3. In Script Manager, create a new script with the line 'import csv'
4. Run the script.
5. See error

Expected behavior
import csv should load the CSV module without error.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Version 8.3.5, or 8.3.4, or 8.3.3,

Additional context
This error does not occur when using the Cross Platform UI.