[boskid][2.0.28] Rail planner changes origin when hovering over undo button

[Agnasius]

When placing rails, hovering over the undo button directly after placing a piece of rail resets the planner's start to the start of the previous segment that was just placed.
I would expect that hovering over the undo button does not change from where I am currently placing rails.
This happens every time and is easily reproducible as shown in the video.

[boskid]

Thanks for the report. Issue is now fixed for 2.0.30.