Hackathon Feature Request: Easily see which Elements have comments

Be great if the Elements Tree could show which elements have comments on them.

I’d like a quick and easy way to see which elements have comments and the Element Tree could be the best place to have a ’ Only show Commented’ checkbox to only show elements that have comments, just like there is already a ‘Only show hideable’ checkbox.

Also be good that when this checkbox is ticked, all elements automatically open to comments view on the element.