Media Grid: 

* The "Edit Image" link in the attachment modal details is redundant.
* After an attachment is deleted in the modal, automatically move to the next attachment in the library. If there are no attachments left, close the modal.

See #24716.

Built from https://develop.svn.wordpress.org/trunk@29085


git-svn-id: http://core.svn.wordpress.org/trunk@28871 1a063a9b-81f0-0310-95a4-ce76da25c4cd