[TASK] Make capitalization of BE module names consistent

This change makes language labels for backend module names consistent
by following the rule "first letter of both words upper-case" (e.g.
"Admin Tools").

Resolves: #90993
Releases: master
Change-Id: I58aef178b3c0a781e1046e381340ad29fa19c7ea
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64114


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Josef Glatz <josefglatz@gmail.com>
Tested-by: Björn Jacob <bjoern.jacob@tritum.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Josef Glatz <josefglatz@gmail.com>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Guido Schmechel <guido.schmechel@brandung.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>