- Add summary to a topic and log out.
- Log in as a different user and click 'Mark as resolved' on the topic from #1
- The user who does 'Mark as resolved' is forced to click on 'Update summary' option. Thus, the user will be displayed as the one who edited the summary the last - and the user's name will be displayed in 'Summary last edited by..'.
It should be possible to 'Mark as resolved' without updating the summary.