[BUGFIX] Use correct maximum width/height for media preview

Smaller images must not be blown up in visual size if smaller than
400x590px.

Resolves: #94475
Releases: master, 10.4
Change-Id: I8ef7e084a55d41778d6a71ff50cdc3125bcb176f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69909


Tested-by: core-ci <typo3@b13.com>
Tested-by: Guido Schmechel <guido.schmechel@brandung.de>
Tested-by: Daniel Haupt <mail@danielhaupt.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Guido Schmechel <guido.schmechel@brandung.de>
Reviewed-by: Daniel Haupt <mail@danielhaupt.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>