Fix add user dialog

[CarlSchwan]

• Add label instead of placeholder for accessibility
• Port to new vue components

[szaimen]

the multiselect looks strange but I guess it will be improved with the next beta release of vue 7.0, correct?

[Pytal]

Let's get this in after https://github.com/nextcloud/server/pull/34044

[CarlSchwan]

/compile amend /

[PVince81]

• [ ] BUG: dialog doesn't close after creating a user, it just empties itself (same with an without the admin password prompt)

[szaimen]

• [ ] BUG: dialog doesn't close after creating a user, it just empties itself (same with an without the admin password prompt)

Maybe something wrong with resetting the focus or something?

---

Also, can we remove the custom multiselect styling and check if it improves the look?

[szaimen]

@CarlSchwan what is missing here?

[PVince81]

@Pytal please take over when the time is right as it touches accessibility

[szaimen]

Now that we updated nextcloud/vue miltiple times in the meantime, maybe even a rebase already makes it work...

[szaimen]

I rebase this and pushed the changes to https://github.com/nextcloud/server/pull/35898