fix: Fix unit selection in file type

[Koc]

Closes #3408

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[Chartman123]

Nice, thanks :) do we have to adjust the other @input's in the menu, too?

[Koc]

I thought about that as well 🤝 but it works fine with even with @input 🤷‍♂️ . So I've decided to reduce amount of changes.

If you want - I can adjust all of them, just say

[Chartman123]

Yes, would be nice :)

@input is no longer listed in the events section of the style guide. so might stop working sometime in the future :)

https://nextcloud-vue-components.netlify.app/#/Components/NcActions

Please also have a look at the custom file extensions, in my prod instance the field only takes numbers

[Koc]

@Chartman123 I did more changes, but...

1. there are short answer question type that relies on event?.isComposing (used for Chineese/Japanese). Sorry, but I have no any idea how to combine this with update:modelValue, it seems like we still need @input for that
2. extension selection not works for me. It works fine for vue-select but not works for Nextcloud wrapper

feel free to push to my branch