[BUGFIX] Add footer section to ListWidget template

Adds the missing footer section, including the button definition,
which can be set in the configuration, to the widget template.

Resolves: #91056
Releases: master
Change-Id: I2ec3c954e0ac8fec0814848fdb0d4bea897b48d3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64195


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Richard Haeser <richard@maxserv.com>
Tested-by: Josef Glatz <josefglatz@gmail.com>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Richard Haeser <richard@maxserv.com>
Reviewed-by: Josef Glatz <josefglatz@gmail.com>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>