3.2 pagepicker and filepicker mixins implementation

I had to patch my link-field plugin due to breaking changes in 3.2’s pages and files fields. I noticed the new pagepicker and filepicker mixins. They are very cool because they abstract the functionality needed to incorporate the functionality in your own plugins (as I did) without having to include the fields themselves and reuse their code that way (as I previously did).

I’ve changed my plugin so it uses the newly introduced mixins. Everything works far better now and seems to be OK. Here’s the commit. Is there something that I missed and that can go wrong?