Function: Ajax handler to delete a page.

Function: Ajax handler to dim a comment.

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.

Function: Ajax handler for the Heartbeat API in the no-privilege context.