fix/#296: Remove marks in text panel if annotations panel is not visible
- When toggle off the annotation panel from the header, the highlight marks in text panel will be removed.
Does the result of the MR comply to our "definition of done"?
Unit tests passed
Acceptance criteria met
Functional tests passed
Non-Functional requirements met
Product Owner accepts the User Story
I added a statement to the CHANGELOG.
I updated the README (if applicable)
I provided my functions with appropriate documentation