Revamp the reorderable list component

[janfaracik]

There's a few issues with this still so getting it up in draft for now.

Before

After

The goal of the revamp is to cleanup and simplify the reorderable list interface, making it easier on the eyes but also more compact. There's a lot of unnecessary (and unintentional) padding at the moment which makes it a little awkward looking. Reordering the list is also a little clunky, so this PR adds an animation which makes it a lot more pleasant to drag around.

Testing done

Proposed changelog entries

• human-readable text

Proposed upgrade guidelines

N/A

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1. The Jira issue, if it exists, is well-described.
2. The changelog entries and upgrade guidelines are appropriate for the audience affected by the change (users or developers, depending on the change) and are in the imperative mood (see examples). Fill in the Proposed upgrade guidelines section only if there are breaking changes or changes that may require extra steps from users during upgrade.
3. There is automated testing or an explanation as to why this change has no tests.
4. New public classes, fields, and methods are annotated with @Restricted or have @since TODO Javadocs, as appropriate.
5. New deprecations are annotated with @Deprecated(since = "TODO") or @Deprecated(forRemoval = true, since = "TODO"), if applicable.
6. New or substantially changed JavaScript is not defined inline and does not call eval to ease future introduction of Content Security Policy (CSP) directives (see documentation).
7. For dependency updates, there are links to external changelogs and, if possible, full differentials.
8. For new APIs and extension points, there is a link to at least one consumer.

Desired reviewers

@mention

Before the changes are marked as ready-for-merge:

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2. Conversations in the pull request are over, or it is explicit that a reviewer is not blocking the change.
3. Changelog entries in the pull request title and/or Proposed changelog entries are accurate, human-readable, and in the imperative mood.
4. Proper changelog labels are set so that the changelog can be generated automatically.
5. If the change needs additional upgrade steps from users, the upgrade-guide-needed label is set and there is a Proposed upgrade guidelines section in the pull request title (see example).
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[github-actions]

Please take a moment and address the merge conflicts of your pull request. Thanks!

[mawinter69]

Maybe add screenshots for something that has also content like the build steps in a freestyle job