Prevent users from adding commas "," and semicolons ";" in comment fields

[Vincent-SD]

This pull request closes issue #39

[bastianilso]

Hi Vincent, thanks for the first pull request 🍹

What happens now is that we go over the pull request contents in-depth, which is good practice, both for learning and also for future collaboration on open-source software.

Feedback:

• The title of your pull request is good and descriptive of what you are trying to fix. 👍
• When we create a pull request, please also provide a reference to the issue you are fixing. Fx by writing "this pull request closes issue #39". This links the issue with your pull request, so when we merge it, the issue will close.
• For larger features in the future, having pictures will also be necessary, but for this pull request it is fine. 🌴
• Your pull request contains 3 commits (see commit tab). For this work, we need to squash your commits together to 1 commit. Check out this tutorial on how to do a Git Interactive Rebase - this is an operation you can always abort, so dont worry if you mess up (your work is now on the Github server and can always be pulled down).
• A commit should represent a single piece of work - please keep your changes to .gitignore in a separate commit from the code change fixing issue #39. Follow the guidelines in this: How to write a good commit messages
• Your commits currently contain some "Debug.Log" statements. As part of rebasing, try to remove these statements, so only your code changes are left.
• The code itself looks good, I will test it out once the pull request is cleaned up! 🧹