How to hide / delete empty comments ('sticky notes')
When highlighting text, I like to add comments to some of the highlighted areas.
However, when i try to display these notes later on, I see that every single highlighted area is displayed as a 'comment'.

How can one delete or hide these empty comments (so that only the 'actual' comments appear)?
I have tried comment settings and searched for this question but couldn't find any good answer thus far.
Your advice would be greatly appreciated.
Regards,
M