Media resize settings should list all non built-in post types

Sometimes custom post type doesn’t have post-thumbnail support. But image attachments have thumbnail support.
For this reason all non built-in post types should be listed for filtering.

Not sure how, but consider to rethink the section in options-media.php#L81
// Avoid the post_types without post thumbnails feature

Also, the logic should be the otherway around in the IF:

// if( !array_key_exists( 'thumbnail' , $_wp_post_type_features[$ptype->name] ) || $_wp_post_type_features[$ptype->name] == false ) {

if( $_wp_post_type_features[$ptype->name] == false || !array_key_exists( 'thumbnail' , $_wp_post_type_features[$ptype->name] ) ) {

https://www.ads-software.com/extend/plugins/simple-image-sizes/