Field::Polymorphic no longer renders like a Field::BelongsTo in version 1.0.0.beta3

[mpvosseller]

In 1.0.0.beta3 a Field::Polymorphic field no longer renders similar to a Field::BelongsTo field as it did in 0.20.1.

Specifically it no longer has a text field that a user can type into to filter the list. It almost looks like Field::Polymorphic is now rendering as a browser built in select widget rather than the nice custom Administrate widget it previously used (and which Field::BelongsTo still uses).

You can see this by running the example_app and looking at a LogEntry logeable and comparing version 0.20.1 to 1.0.0.beta3.

Below are screenshots comparing 0.20.1 as deployed on heroku and 1.0.0.beta3 running locally on my machine:

[nickcharlton]

It sounds like we've broken Selectize here, have you seen the same anywhere else in the demo app?

[mpvosseller]

@nickcharlton I have not. Thanks for looking into this!