Improve config page display when values are null

[nandhinibsn]

Resolve #

Description:

Referring to this PR - #366

Checklist:

You should check all boxes before the PR is ready. If a box does not apply, check it to acknowledge it.

• ISSUE NUMBER. You linked the issue number (Ex: Resolve #XXX).
• PRE-COMMIT. You ran pre-commit on all commits, or else, you
  ran pre-commit run --all-files at the end.
• USER CHANGES. The changes are added to CHANGELOG.md and the documentation, if they impact
  our users.
• DEV CHANGES.
  • Update the documentation if this PR changes how to develop/launch on the app.
  • Update the README files and our wiki for any big design decisions, if relevant.
  • Add unit tests, docstrings, typing and comments for complex sections.

[JosephMarinier]

In the future, please don't close and re-open PRs just to rename the branch. It makes us lose our review conversation. It also closed my PR that was based on yours and deleted my branch.

[nandhinibsn]

In the future, please don't close and re-open PRs just to rename the branch. It makes us lose our review conversation. It also closed my PR that was based on yours and deleted my branch.

Sure, I was not aware it would create a new branch and close the old one. That's why I did not change the branch names for my other PRs

[JosephMarinier]

👍