Github user emilianbold commented on the issue:
https://github.com/apache/jmeter/pull/300
> I think I can reproduce Philippes problem. And it will probably look
really strange to a user.
Currently undo stores the model changes, not every UI change. There are
some other hooks to add for that. And it's not necessarily an easy thing to
add, depending what kind of state hides behind that UI component.
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