Summary: The current event label used the event type. The type in itself can have this shape: `ck:willMountComponent` The event name is just 'willMountComponent'. So, extract that piece of data instead. Reviewed By: aigoncharov Differential Revision: D43983728 fbshipit-source-id: e232b59cfe3eb0710e56fc9ba7f94b644b07ee74