The Dev console's Observe > Events tab page is still part of the console codebase. The code should be moved to monitoring-plugin to complete the migration of all monitoring UI to the plugin. Currently there is no "Events" functionality in the plugin, so this will be a case of moving all of the relevant code and dealing with any missing dependencies. It looks like `EventsList` (in frontend/public/components/events.jsx) has quite a few dependencies that will need to be added to the plugin SDK or refactored away or (worst case) added to the monitoring-plugin codebase.