feat(extension): added 'extensionManager' to 'onModeEnter' parameter list (#4569)

platform/core/src/extensions/ExtensionManager.ts

@@ -175,6 +175,7 @@ export default class ExtensionManager extends PubSubService {
           servicesManager: _servicesManager,
           commandsManager: _commandsManager,
           hotkeysManager: _hotkeysManager,
+          extensionManager: this,
         });
       }
     });