Description

Resets the NUPaths in the add course modal when its closed/open

Closes #716

Type of change

Please tick the boxes that best match your changes.

[x] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
[ ] This change requires a documentation update
[ ] This requires a run of yarn install
[ ] This has migration changes and requires a run of yarn dev:migration:run

Please describe how you tested this PR (both manually and with tests) Provide instructions so we can reproduce.

[x] I have run the production builds in docker for the frontend/backend and ensure things run fine. Check README of repo on how to run if not sure.
[x] I have performed a self-review of my own code
[x] I have commented my code where needed
[x] I have made corresponding changes to the documentation
[x] My changes generate no new warnings
[x] I have added tests that prove my fix is effective or that my feature works
[x] New and existing unit tests pass locally with my changes
[x] I've run the end to end tests
[x] Any dependent changes have been merged and published in downstream modules