Cost and graph display update — Steam Revolution: The Age of Rail Steam update #47432

Added a costs button that shows the infrastructure cost for the level. This can be displayed without running the simulation, so you don't need to have a completed solution. Added an overlay near to the cursor that shows the cost of the the current selected infrastructure. It also shows the cost of any track that is being drawn. Show ticks under graph. This allows you to know at what time things happen in the graph, such as at what time a peak or trough occurred at. Shift clicking tracks in route mode will do multi select. If you click on a track that doesn't have all routes selected yet, it will add those routes. Otherwise it will remove the routes on that track from the selection.