List Tables: Revert [34728] and [35482].

Part of [34728] was already reverted in [35682], but the default values still made it impossible to set a default ordering for custom post types.

See #25493.
See #34825.
Built from https://develop.svn.wordpress.org/trunk@35818


git-svn-id: http://core.svn.wordpress.org/trunk@35782 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/post.php

@@ -1008,16 +1008,12 @@ function wp_edit_posts_query( $q = false ) {
 		$orderby = $q['orderby'];
 	} elseif ( isset( $q['post_status'] ) && in_array( $q['post_status'], array( 'pending', 'draft' ) ) ) {
 		$orderby = 'modified';
-	} elseif ( ! is_post_type_hierarchical( $post_type ) ) {
-		$orderby = 'date';
 	}
 
 	if ( isset( $q['order'] ) ) {
 		$order = $q['order'];
 	} elseif ( isset( $q['post_status'] ) && 'pending' == $q['post_status'] ) {
 		$order = 'ASC';
-	} else {
-		$order = 'desc';
 	}
 
 	$per_page = "edit_{$post_type}_per_page";
@@ -1844,4 +1840,4 @@ function redirect_post($post_id = '') {
 	 */
 	wp_redirect( apply_filters( 'redirect_post_location', $location, $post_id ) );
 	exit;
-}
+}