Add selection boxes next to each event/query/chart/report section. Include a "select all" option that would check every selection box.
Add an update feature that would allow the activation or deactivation of selected events/queries/etc.
Add a Delete button to delete selected items such as events and queries.
This would be beneficial to cleaning up old or unused queries/events/etc. and save hours of time from having to delete and/or deactivate items one at a time.