Restore table checkboxes on load

[Arnei]

Fixes #1136.
Table checkboxes were not rendered upon initial load. This patch fixes that.

How to test this

Can be tested as usual. Tables should again always render the selection checkboxes (if applicable for that table). The reset button in the edit table view modal should also continue to work.

[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-1139

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-1139

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/1139/2025-03-11_08-47-26/ .
It might take a few minutes for it to become available.

[NadiaUoM]

Just a small question. Why you have added " | " on line no. 73? Because without adding this still checkbox are getting loaded.

[eduardklinger]

Just a small question. Why you have added " | " on line no. 73? Because without adding this still checkbox are getting loaded.

This added an empty string ("") to the types, because the default value was changed to "", which was not included in type Resource. The | just connects the empty string with the rest of the string values.

[eduardklinger]

The default resource value "events" prevented updating the multiSelect value on the first events table load.

Setting the default value to "" triggers updating the multiSelect value, which renders the checkboxes.

[Arnei]

Arguably we should just make sure that multiSelect is set correctly on first table load, but this also works and removes the assumption that "events" is the first table we load, so shrug.

Thanks for reviewing!