Cannot scroll through Skeleton / Segments Tab while moving a tree / segment

[MichaelBuessemeyer]

Context

When working with many segments / trees sorting and grouping is essential. When trying to move a tree / segment in the list into some group that is not within the visible range one should be able to scroll the view by "hovering" the segment at the top / bottom of the list. But this is currently no longer possible. This is potentially due to the antd tree implementation we are using now.

Expected Behavior

It should be possible to vertically scroll through the hierarch list when moving the tree / segment to the top/bottom of the list.

Current Behavior

The view does not scroll

Steps to Reproduce the bug

• Cannot reproduce the bug anymore / needs deeper investigation.

1. create a lot of trees
2. create a group
3. try to move one of the trees at the bottom into the group (which is not rendered in the long list)
4. scrolling should be impossible by "holding" the tree at the top of the list

For reference: https://discuss.webknossos.org/t/scrolling-while-moving-trees-to-group/1870

[MichaelBuessemeyer]

ant-design/ant-design#31057 is very likely our problem here. I'll try to implement the mentioned fix.