The interfaces of the dashboard have been moved out of the
interfaces folder to be consistent with the overall TYPO3 structure.

Additionally, the superfluous button utility has been removed.

Releases: master
Resolves: #91066
Change-Id: Iaad0c1d8d046b467ee44d8cbbe32f8803c737fae
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64201


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Richard Haeser <richard@maxserv.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Richard Haeser <richard@maxserv.com>