Add issue number to review comments overview.

If you want to search through the comments that have been given by reviewers on a document, it is now only possible to select a revision level. It would be convenient to be able to select a revision and issue number so you can quickly see which comment was given to which document issue and revision. You can see via the revision archive which issue is connected to which revision, but this method of working is a bit devious. So my suggestion would be to add the issue number to the drop down menu when you want to search for the review comments per Revision/Issue.