Option to hide offline users from list

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Feature request

Which Nextcloud Version are you currently using: (see administration page)

31.0.10 AIO

Is your feature request related to a problem? Please describe.

We have quite a number of people in our instance and the user pane on the left gets confusing - especially because it is not ordered alphabetically.

Describe the solution you'd like

I would like to have an option in the filter (next to the search field) to hide offline users.

Describe alternatives you've considered

If that is not possible, an optional sorting by alphabet would be ok. But not only by display name as for PHD graduates this starts with "Dr.". Last name would be great.

Additional context

Start by locating the user pane and the filter control beside its search field in the JavaScript frontend. Check how online or offline presence is represented and how the list is currently ordered; done means an optional offline-user filter works without breaking search, with the requested behavior covered by the relevant existing tests if present.