[BUGFIX] Remove padding for selects

Task #55319 introduced a padding for selects,
which looks ugly in Internet Explorer and Firefox.

Resolves: #55510
Related: #55319
Releases: 6.2
Change-Id: I324c5feae256e4b8329b69493dd4f8b9215cab13
Reviewed-on: https://review.typo3.org/27190
Reviewed-by: Wouter Wolters
Reviewed-by: Stefan Froemken
Tested-by: Stefan Froemken
Reviewed-by: Marcel Wieser
Tested-by: Marcel Wieser
Reviewed-by: Marcin Sągol
Tested-by: Marcin Sągol
Reviewed-by: Benjamin Mack
Tested-by: Benjamin Mack