remove pluginStates on disconnect

Summary:
When a client disconnects, we want to remove all plugins states for this client, so the next time the client reconnects the plugins start with an empty state.

The main use case for this is when recompiling the app and launching it in the simulator, we don't want to show old network-requests or QPL events.

Reviewed By: passy

Differential Revision: D10447808

fbshipit-source-id: 5fb3f24ee37f564e8dc00315bff86a2bcd5f65f2

src/dispatcher/server.js

@@ -26,6 +26,10 @@ export default (store: Store, logger: Logger) => {
       type: 'CLIENT_REMOVED',
       payload: id,
     });
+    store.dispatch({
+      type: 'CLEAR_PLUGIN_STATE',
+      payload: id,
+    });
   });
 
   server.addListener('error', err => {