How to show API Models on add app page on dev portal?

[fishbd1]

I want to add an attribute on the Add an App page that points to the API model using an auto complete widget (currently autocomplete is not included as a widget option). Once an API is selected I would then like to filter products by the selected API. We will potentially have a huge amount of Products and don't want the app developer to have to sift through Products list if they know which API they want to register for.

https://community.apigee.com/questions/20066/how-to-show-custom-attributes-on-add-app-page-for.html#...