[BUGFIX] Fix false icons widths in FormEngine IconSelect

The width of Icons in TCA selects adjusted in https://review.typo3.org/c/55568/
has been corrected to have Icons use their proper width (128px) again.

Resolves: #83840
Releases: master, 8.7
Change-Id: Ia1e6dee77012b772c3fd5cae7199b075c66389d7
Reviewed-on: https://review.typo3.org/55645


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Riccardo De Contardi <erredeco@gmail.com>
Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Reviewed-by: Benjamin Kott <benjamin.kott@outlook.com>
Tested-by: Benjamin Kott <benjamin.kott@outlook.com>