Only send Update for previously-published posts (#833)

Author: mattwiebe

includes/class-scheduler.php

@@ -142,8 +142,9 @@ public static function schedule_post_activity( $new_status, $old_status, $post )
 			$type = 'Create';
 		} elseif (
 			'publish' === $new_status ||
+			// We want to send updates for posts that are published and then moved to draft.
 			( 'draft' === $new_status &&
-			'draft' !== $old_status )
+			'publish' === $old_status )
 		) {
 			$type = 'Update';
 		} elseif ( 'trash' === $new_status ) {