Function: Ajax handler for sending a post to the Trash.

Function: Ajax handler to restore a post from the Trash.

Function: Ajax handler to delete a page.

Function: Ajax handler for compression testing.

Function: Ajax handler for image editor previews.

Function: Ajax handler for oEmbed caching.

Function: Ajax handler for user autocomplete.

Function: Ajax handler for dashboard widgets.

Function: Ajax handler for Customizer preview logged-in status.

Function: Sends back current comment total and new page links if they need to be updated.