[BUGFIX] Show labels for export buttons

This patch enables the labels for the export buttons which are
hard to distinguish in case both appear side by side.

Resolves: #88804
Releases: master, 9.5
Change-Id: Ie9a72823fcc1788ca10ae93f267c408a8da90212
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61326


Tested-by: Benjamin Kott <benjamin.kott@outlook.com>
Tested-by: Daniel Windloff
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Benjamin Kott <benjamin.kott@outlook.com>
Reviewed-by: Daniel Windloff
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>