Patch Issue 2358493

* Apply patch-2353967-6 
 * Add extra_info block
 * Extend from base/file.php.twig
 * Implement twig blocks from file.php.twig
 * Remove insertHookTheme method
 * Add renderView method
 * Remove call to insertHookTheme method
 * Call renderView method
 * Display hook_theme message after code generation