Upgrade tool should be able to convert ground rails to elevated

[Wenihal]

Possibility to configure upgrade tool to convert ground rails to eleveted. All ground rails are marked for deconstruction and in place elevated rails are blueprinted. Of course all rail signals should be maintained. Also rail supports should be placed where necessary.

Tool could also work the other way around: from elevated to ground.

[boskid]

Also rail supports should be placed where necessary.

This is the tricky part. No.