Add/Edit user dialog: aligned roles

[Janni2006]

This PR fixes #1264

The roles view is now alligned as descriped in the issue inspired by the possible solution.

[github-actions]

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[github-actions]

Use docker or podman to test this pull request locally.

Run test server using develop.opencast.org as backend:

podman run --rm -it -p 127.0.0.1:3000:3000 ghcr.io/opencast/opencast-admin-interface:pr-1280

Specify a different backend like stable.opencast.org:

podman run --rm -it -p 127.0.0.1:3000:3000 -e PROXY_TARGET=https://stable.opencast.org ghcr.io/opencast/opencast-admin-interface:pr-1280

It may take a few seconds for the interface to spin up.
It will then be available at http://127.0.0.1:3000.
For more options you can pass on to the proxy, take a look at the README.md.

[github-actions]

This pull request is deployed at test.admin-interface.opencast.org/1280/2025-05-14_12-30-45/ .
It might take a few minutes for it to become available.

[Arnei]

The header "selected roles" is in the wrong place. There currently also is a lot of wasted space:

[Janni2006]

@Arnei I couln´t recreate the issue with the header being in the wrong place. Do you have an idea on how I could replicate the issue?

As for the wasted space, do you have a suggestion on what could be moved?

[Arnei]

I am using Firefox 137 under Fedora.

The cause might be due to a wrong CSS class being applied? Deactiving width: 47% seems to fix it for me.

Regarding the wasted space, maybe have the right box start where it was originally starting, but have it stretch down so that the bottoms of both the left and right box are aligned? Might be a good compromise between alignment and using space effectively.