typo3

Define the fields `imagewidth` & `imageheight` of content elements
nullable to avoid a default value of `0` which confuses editors. No
other field is filled with a value which can't be removed.

Resolves: #68303
Releases: main
Change-Id: I43f2576524a869fdb898d7fdbc8e74a493f5e443
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/85156


Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>