Add trap stack util to public API

[Pytal]

For use in server and apps

[skjnldsv]

Can you point or explain a context where we would use that in server or an app?
Assuming all the elements requiring a focus trap are vue components, doing this should not be necessary

[Pytal]

Can you point or explain a context where we would use that in server or an app? Assuming all the elements requiring a focus trap are vue components, doing this should not be necessary

Could be used in nextcloud/server#35381 as the user and contacts menus are not in Vue

[skjnldsv]

I would migrate them to vue and use the HeaderMenu then, no?

[Pytal]

I would migrate them to vue and use the HeaderMenu then, no?

The menus have been using the legacy js implementation for awhile so if the component is flexible enough then sounds good!

Would then need #3489 first

[skjnldsv]

There was an attempt:

• Move contactsmenu to vue nextcloud/server#22274

[Pytal]

Not needed as menus will use NcHeaderMenu