Rachel Baker 5564716a07 REST API: Modify the structure of our DELETE responses to be more explicit.
Add the `deleted` property to the root of the Response object to communicate if the delete action was successful. Move the state of the resource prior to the delete request under a new `previous` property.  As a result DELETE responses are now structured like so:
 `{ deleted: true, previous: { ... } }`

Also includes helpful information to DELETE requests for resources that are not trashable.

Props timmydcrawford, rmccue, jnylen0.
Fixes #38494.
Built from https://develop.svn.wordpress.org/trunk@39126


git-svn-id: http://core.svn.wordpress.org/trunk@39066 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-11-04 17:11:29 +00:00
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