Option to show comments indicator, but not automatically popup the comment on hover or select.
Add an option to show the comments indicator, but not pop-up on hover. Instead show indicator and then include a right click option within the cell to show the comment popup. That way comment popups don't show up on hover at all, but an indicator shows that a comment is present. It enables the ability to selectively show a comment instead of always showing a comment when one selects or hovers on a cell.