Undo!

After popular suggestion in the forums, it is finally here: Undo! This was much harder to implement than I first thought, and there are some limitations but it works reasonably well. Features: - Button to undo up to 10 of the last "build" actions, such as track / road laying, signals, bus stops, stations and other constructions - Undo will give you a full refund of the amount spent - A "redo" button that will allow you to "undo undo", this will charge you the normal amount Limitations: - It cannot resurrect demolished town buildings. I attempted to replace these but they come back as zombie buildings, it seems that only the internal TF code can build these correctly - It cannot replace auto removed assets and decorations, so an un-done track laying (for example) will leave behind a "scar" on the landscape - Undoing or redoing large chains of actions becomes increasly less likely to work as the number of events grows - which is why I limited it to 10 - It cannot undo anything that was done by another script or mod (with the exception of some of my own mods which have been integrated) I have been through many crashes to desktop developing this mod, it now seems stable but I strongly recommend (auto) saving regularly, and please report any issues - importantly - including log snippet and also what mods were in use (so I have a hope of fixing it). Enjoy!