diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-admin/includes/list-table.php
--- a/wp/wp-admin/includes/list-table.php	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-admin/includes/list-table.php	Mon Oct 14 17:39:30 2019 +0200
@@ -13,6 +13,8 @@
  * @access private
  * @since 3.1.0
  *
+ * @global string $hook_suffix
+ *
  * @param string $class The type of the list table, which is the class name.
  * @param array $args Optional. Arguments to pass to the class. Accepts 'screen'.
  * @return object|bool Object on success, false if the class does not exist.
@@ -25,7 +27,7 @@
 		'WP_Terms_List_Table' => 'terms',
 		'WP_Users_List_Table' => 'users',
 		'WP_Comments_List_Table' => 'comments',
-		'WP_Post_Comments_List_Table' => 'comments',
+		'WP_Post_Comments_List_Table' => array( 'comments', 'post-comments' ),
 		'WP_Links_List_Table' => 'links',
 		'WP_Plugin_Install_List_Table' => 'plugin-install',
 		'WP_Themes_List_Table' => 'themes',
@@ -64,50 +66,19 @@
  * @see get_column_headers(), print_column_headers(), get_hidden_columns()
  */
 function register_column_headers($screen, $columns) {
-	$wp_list_table = new _WP_List_Table_Compat($screen, $columns);
+	new _WP_List_Table_Compat( $screen, $columns );
 }
 
 /**
  * Prints column headers for a particular screen.
  *
  * @since 2.7.0
+ *
+ * @param string|WP_Screen $screen  The screen hook name or screen object.
+ * @param bool             $with_id Whether to set the id attribute or not.
  */
-function print_column_headers($screen, $id = true) {
+function print_column_headers( $screen, $with_id = true ) {
 	$wp_list_table = new _WP_List_Table_Compat($screen);
 
-	$wp_list_table->print_column_headers($id);
+	$wp_list_table->print_column_headers( $with_id );
 }
-
-/**
- * Helper class to be used only by back compat functions
- *
- * @since 3.1.0
- */
-class _WP_List_Table_Compat extends WP_List_Table {
-	public $_screen;
-	public $_columns;
-
-	public function __construct( $screen, $columns = array() ) {
-		if ( is_string( $screen ) )
-			$screen = convert_to_screen( $screen );
-
-		$this->_screen = $screen;
-
-		if ( !empty( $columns ) ) {
-			$this->_columns = $columns;
-			add_filter( 'manage_' . $screen->id . '_columns', array( $this, 'get_columns' ), 0 );
-		}
-	}
-
-	protected function get_column_info() {
-		$columns = get_column_headers( $this->_screen );
-		$hidden = get_hidden_columns( $this->_screen );
-		$sortable = array();
-
-		return array( $columns, $hidden, $sortable );
-	}
-
-	public function get_columns() {
-		return $this->_columns;
-	}
-}