Write a function that takes a list of strings and a pattern (string) and returns the strings that contain the pattern in alphabetical order. If the pattern is an empty string, return all the strings passed in the input list.
cms_selector(["WordPress", "Joomla", "Drupal"], "w") ➞ ["WordPress"]
cms_selector(["WordPress", "Joomla", "Drupal", "Magento"], "ru") ➞ ["Drupal"]
cms_selector(["WordPress", "Joomla", "Drupal", "Magento"], "") ➞ ["Drupal", "Joomla", "Magento", "WordPress"]