Issue Insights

Open any issue, scroll to Activity and choose Issue Insights. It shows, for that issue:
- the number of changes and people involved, and the time from first to last change
- total time in each status, with how many times it was visited
- the status timeline
- every change, newest first, with word-level diffs and Restore
After a Restore, Jira refreshes the issue so its fields show the restored value.