[TASK] Use jQuery for IRRE Ajax calls

Change-Id: I5fe2f79ba233e114fb2bfb87c1100eeb8dccbc41
Resolves: #58475
Releases: 6.3
Reviewed-on: http://review.typo3.org/29835
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>