Since there are situations where a user may wish to ignore specific items in the Crawl Diagnostics report, it would be really helpful to be able to select individual URLs in the list and turn them off. Don't want to remove the information from the campaign, just be able to switch off the items that can be ignored.
A good example is where URLs are identified by Roger as duplicates and a user chooses to tell googlebot to ignore parameters in GWMT. Roger will still see them as duplicates, but the user knows that the issue has been dealt with for those pages. If they can be be made to disappear from the diagnostic report, then users will be better able to track progress without needing to keep external lists :)