All implementors of `javascriptOn:` and `javascriptContentOn:` should be reviewed, according to [https://github.com/SeasideSt/Seaside/wiki/Migrating-Seaside-Javascript-wrappers-to-3.6.0](https://github.com/SeasideSt/Seaside/wiki/Migrating-Seaside-Javascript-wrappers-to-3.6.0)