Attachment Taxonomies menu items not highlighted correctly

[dd32]

Attachment Taxonomies menu items are not being correctly highlighted.

Code to reproduce:

function foobar_tax() {
	register_taxonomy('foobar', array( 'post', 'attachment:image' ), array('label' => 'FooBars', 'show_ui' => true) );
}
add_action('init', 'foobar_tax');

Accessing the attachment taxonomy via the Media subheader highlights the "Post" header, Foobar under the Posts menu, and FooBar under the Media heading.

Expected behaviour: "Media" header be highlighted, and Foobar under Media highlighted only.

Patch attached

[dd32]

Oops.. We don't even support Attachment Taxonomies in the admin menu yet #13414 I had that code still active.