TYPO3 Core

I set up a form and want to allow all mime types.
I tried many things.
I let the list with allowedMimeTypes empty, removed the whole property, wrote an '*'.
But nothing.
The check for that checks only if the set value is in the array of $allowedMimeTypes.

I added a little thing in TYPO3\CMS\Form\Mvc\Validation\MimeTypeValidator

if(count($allowedMimeTypes) 1 && $allowedMimeTypes⁰ '*') {
return;
}

So the config could be this:

properties:
allowedMimeTypes:
- '*'

Maybe there is an other solution but i dont find it. oO

Another thing.
In my yaml i dont have the MimeType Validator set, but this validator is always running i think.

Patch set 2 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/55869

Patch set 3 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/55869

Patch set 4 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/55869

Patch set 1 for branch TYPO3_8-7 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/56197