Fix ACL role dropdown width

[Arnei]

The role dropdown in the ACL tabs could extend over its column width, due to its own fixed width. This fixes that.

Replaces #1365

[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-1370

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-1370

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.

[wsmirnow]

Event and series details dialog works now as expected. But new event and new series dialog is not fixed.

Organization > Access policies > Add access policy and details dialog is broken too.

@Arnei can you fix it please?

[Arnei]

The new event/series/acl dialogs look fine to me. Can't yet think of reason why it is different for you.

[gregorydlogan]

I can reproduce Waldemar's experience, even after clearing my cache.

[Arnei]

@wsmirnow Helped me fix my confusion, thanks for that. Should now also properly work for in the New Event/Series/Acl modal and the Acl Details modal.

[wsmirnow]

Works for me. Thank you @Arnei