[BUG] Previous comment is saved upon the creation a new one

[FadyCoding]

Describe the bug
When we create a new comment it saves the previous comment, which forces the user to delete the
content before writing a new one.

To Reproduce
Steps to reproduce the behavior:

1. Go to any widget parameter menu (three vertical buttons at the top right widget window)
2. Click on 'Comment' then on the 'New Comment' green button at the bottom and write a new comment.
3. Click on a 'New comment' again after saving your previous comment.
4. You should notice that your previous comment is saved but still present on the interface.

Expected behavior
We expect the comment to be empty so the user does not have to delete his previous comment to write a new one.

Screenshots

Desktop (please complete the following information):

• Browser [e.g. chrome, safari]

Additional context
Add any other context about the problem here.