[TASK] Install Tool reset BE User with Ajax

The 'Reset backend user preferences' button used a
controller action, but it can be improved by an ajax call.

Resolves: #80570
Releases: master
Change-Id: Idc379696d67a60b4c807abf7bb5abd6fd31f2422
Reviewed-on: https://review.typo3.org/52256


Tested-by: TYPO3com <no-reply@typo3.com>
Tested-by: Preben Rather Sørensen <preben@northchannel.dk>
Reviewed-by: Philipp Hamid <ph@supertrumpf.at>
Tested-by: Philipp Hamid <ph@supertrumpf.at>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>