When `MEDIA_TRASH` is true, show the proper context in the `attachment-details` sidebar. Without this fix, it always showed "Delete Permanently."

Props toszcze.
Fixes #26783.


Built from https://develop.svn.wordpress.org/trunk@27454


git-svn-id: http://core.svn.wordpress.org/trunk@27300 1a063a9b-81f0-0310-95a4-ce76da25c4cd