Bugfix: 42377 & 42369: UI/Fields: Fix undefined input in file inputs

[lukas-heinrich]

This PR fixes an issue caused by #8177 which means that the id of the input field can no longer be accessed. I fixed the issue by using the id of the associated fieldset element as described in the PR.

I am looking forward to feedback or hints if it can be implemented differently.

[kergomard]

Hi all

I assigned you all, because I was unsure if it was the ui-coordinators or @chfsx who felt responsible for this.

You were just a little bit quicker than me @lukas-heinrich ;-).

This has quite a few consequences:

• Settings with new forms cannot be saved.
• Imports don't work.

This would be the issue that triggered my look into it: https://mantis.ilias.de/view.php?id=42369

Thank you all and best, @kergomard

[dsstrassner]

T&A issue for this: https://mantis.ilias.de/view.php?id=42377

[klees]

@nhaagen Review this please.

Thanks @lukas-heinrich

[lukas-heinrich]

Hi @nhaagen !

Thank you for the feedback. This is of course an even simpler solution. I have customized the selector and tested it, it works as it should.

Thanks and best regards. @lukas-heinrich

[Amstutz]

thx big time @lukas-heinrich and @kergomard as well as @nhaagen for the review!