[TASK] Take the no_search field into consideration when generating sitemaps to avoid jobs being shown twice

[FEATURE] Add link to allow external job application URLs, some cleanup, TCA restructured a little bit

[TASK] Release of version 4.1.3, Disallow pagination pages greater than the maximum allowed number of possible pages

https://trello.com/c/PtW89d14/3338-extsgmail-restore-used-filters-after-going-back-eg-inside-the-mail-queue-store-them-inside-a-php-session-also-check-all-other-ba