[2.0.28] Removal of rail support ghosts does not remove elevated rail ghosts

[sben]

Removing rail support ghosts does not remove rail ghosts in the air.

- before removing rail support ghosts: robots ingore building the elevated rails
- after removing rail support ghosts: robots try building the elevated rails causing deadblock of them
- usually it is not possible to remove rail supports before the rails lying on them are removed

Note: this is not a duplicate of 123751.
This was fixed in 2.0.25, that time was only an issue using the editor.
Issue still persist, but also happens in the regular game, without using the editor.

Does it happen always, once, or sometimes?
Happens always, without using the editor.

[Rseding91]

Thanks for the report however I don't believe we will be changing this. The nature of ghosts makes this problematic to address in any sane way internally.