[2.0.62] Undo of automatic underground belt is broken

[sben]

Expectation:

When undoing automatic underground belt placement, either
- all belt before, after and inclusive the underground
- only the belts after the underground
- the underground and the belts after it
get removed.

Experienced behaviour:

The entry and exit underground belt are removed in two different steps, leaving a single, unconnected underground on the map.

This affects both ghost and manual building with or without underground in the inventory, although the behaviour is little different for these cases - either replacing the entry belt with a normal belt or not.