[feature] Being able to change the line number selection for existing comments

[bluenick2k17]

🧩 Feature

Description

I wanted to propose the idea of having a button next to the delete button which allows you to change the line selections for a particular comment, if there are lines selected when you click the button. If there are not lines selected, the button doesn't have any effect or displays a pop up message "No lines selected." Or maybe it will highlight all the lines the comment already uses if you click the button with nothing selected? Interesting thought.

I would also potentially change the color of the delete button just so it is different from the "Select Lines" button.
This would hopefully also support going to and from having multiple selections at a time for a comment.