[TASK] Extensionmanager: Update jQuery-usage

* Use central jQuery 1.9.x
* Update jQuery UI
* Dropped jQuery Tools
* Added Validator
  (previously used from jQuery Tools)
* Made tabs work again

Change-Id: Iabe4fa307beda89cf5e54575179b286fe675ff90
Resolves: #42197
Releases: 6.2
Reviewed-on: https://review.typo3.org/15828
Tested-by: Wouter Wolters
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers
Reviewed-by: Sebastian Fischer
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind