Skeleton tab has too many scrollbars

[hotzenklotz]

Context

In the tracing UI > skeleton tab: Long tree lists and trees with long names can cause the layouting to slightly break. As a consequence there will be various scrollbars. See screenshot:

Durch die Scrollbar links-rechts unten im Skeleton Tab kommt man nicht mehr gut an den letzten Tree. Ich konnte das nicht mehr reproduzieren, aber ein Kollege auf dem Mac hat das Problem. Vielleicht ein Bug, weil zwei Scrollbars angezeigt werden? Bild im Anhang

Likely, a regression of #5872. Both the antd <Tree> component and the surrounding FlexLayout container have some constraints on this layouting.

Expected Behavior

There should only be one vertical scrollbar. (and maybe one horizontal one?)

Current Behavior

There are two horizontal scrollbars. The last tree item in the list is often blocked by the scrollbars.

Your Environment for bug

• Version of WEBKNOSSOS (Release or Commit): 24.08.0