add another button to "image_link_input_fields" function, or add output filtering

[aesqe]

"image_link_input_fields" function outputs one input field and 3 buttons in attachment data editing forms.
they are used to choose linking options for the attachments you want to insert into a post.
the options are: none, file url or post (attachment) url.

it would be great if there was another button which would let users link the attachment to the parent post (or to the post which is currently being edited), or maybe even better - add filtering to function's output.

OK, sorry about this one, one can quite easily add new buttons via "attachment_fields_to_edit" filter, I just didn't realize it soon enough :)