Fix layout of file upload in add event dialog

[lkiesow]

This patch fixes the table layout of the upload section in the add event dialog which had overlapping elements.

Not the actions again have their own small column.

The problem was caused by #626

[github-actions]

This pull request is deployed at test.admin-interface.opencast.org/666/2024-06-06_10-07-07/ .
It might take a few minutes for it to become available.

[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-666

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-666

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.

[kruemelm0nsta]

looks OK again