UI, ViewControls/DataTable: 41310, add nullControl to reserve input name

[nhaagen]

https://mantis.ilias.de/view.php?id=41310

[klees]

@thibsy / @Amstutz: CaT internal QS is done, this seems to be good for your review.

[Amstutz]

Hi @nhaagen

Thx a lot for this enhancement. It was not immediately clear to me, why we would need this instead of living with null. However, I believe to understand the advantage (thx @klees).

Therefore, please change or indicate why not:

• Enhance the purpose description: Maybe drop a phrase that we use this where we otherwise would need to pass null? It might be obvious to most, but could help some.

Please change:

• Add a rendering test: Making sure nothing is rendered.

One last thing: Thx for the code style improvements. However, they make PRs sometimes difficult to read. Maybe put them in separate PRs in the future.

Thx a lot
@thibsy, @klees and @Amstutz

[matthiaskunkel]

Jour Fixe, 27 MAY 2024: We highly appreciate the suggestion and accept the PR for all maintained versions (incl. 8).

[Amstutz]

Thx a lot for the refinements!