We need to use page body event delegation so it will work with any
element even with the ones added through ajax, in this case the
annotation comments box form. By doing this way we do not need
this code on the server response anymore.
Furthermore JS events defined at ajax responses are not part of
application javascript and are lost when restoring a page from
browser cache, you can try to apply the same event delegation
technique to the `erb` file and it wont work just because events
added dinamically are not treated the same than `application.js`
code.
To reproduce the error:
1. Load an annotatable draft version
2. Move to any other page
3. Go back
Now "Publish comment" button wont work.
If we do not destroy annotator app before storing the page at
browser cache we will unnecesarily initialize annotations twice (or
more) duplicating Annotator HTML markup and causing
unexpected errors.
Without this commit you will find an error when restoring a page with
annotator, you can click on any annotation and you will see the annotation
comments are being loaded twice.
IMO this is an idempotency issue within Annotator JS library.
