A Cloud addon was recently released that would help with this:
See All Unresolved Comments
Not only do you get a counter at the top to see how many unresolved inline comments are in a page, but you can also click to jump directly to the first comment. You can even search (run a report) to see all unresolved comments filtered by space and/or commenting user. For longer pages, there's also an overview report that shows just the headings and the commented text, so you can get a quick overview of what's on any particular page.
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