Fix custom post type published status issue

[tbtmuse]

This PR fixes an issue where the post status of a custom post type cannot be changed to Wordpress' built-in status of "published."  This occurs when a custom post type has been configured without "editor" support.

Analysis

In order for the framework to provide a meta-box content auto-saving feature, it listens for the submission of a post's Add/Edit form and dispatches an "isSavingPost" event. In doing this, the default form submission behaviour is prevented, the event is dispatched, and then the form is submitted via .submit(). The issue with this approach is that the .submit() function does not add names/values of submit buttons to the post data and this is something that Wordpress relies on internally.

How to reproduce the problem

Create a custom post type using the framework's PostType facade, set supports to an array excluding "editor," and try to publish a post.

  PostType::make('slug', 'plural', 'singular')
          ->setArguments(['supports'  => ['title']])
          ->set();

Solution

Dispatch "isSavingPost" event without changing default submission behaviour.

[jlambe]

Thanks for your submission @tbtmuse I will test it before merging.

[tbtmuse]

Thanks for the awesome framework! another PR coming up!

[jlambe]

@tbtmuse Thanks for your submission. It has been merged.