Fix confirmation modal tests

This is the proof that nobody is running `@javascript` scenarios. :smile: 

BTW, why are they not executed on Travis? Why do we have:

```
    - wget http://selenium-release.storage.googleapis.com/2.41/selenium-server-standalone-2.41.0.jar
    - java -jar selenium-server-standalone-2.41.0.jar > /dev/null &
```

in travis.yml then?