[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

VHS was made a requirement with TYPO3 10 now, but for TYPO3 9
compatibility we cannot replace old ViewHelpers yet.
We need to make these replacements with TYPO3 11 then.

[TASK] Change layout of application form
[TASK] Rename variables