I am trying to hide the Alignment radio buttons for images uploaded to the post content area, but can't figure out how to add a custom CSS or JS file to the Image Editor dialog.

I've successfully added a filter to the tiny_mce_before_init action hook to remove alignment buttons from the TinyMCE text editor, but am unsure how to do the same with the image editor.

I'm currently hooking into admin_enqueue_scripts to load my JS, and am using the code snippet below, but I'm unable to manipulate anything in the .mceWrapper

$('.mceWrapper iframe').load( function() {