Train aging and Mass replacement — Mashinky Steam update #818380

Hello respected community! https://cdn.steampulse.org/steam/asset?u=https%3A%2F%2Fsteamcdn-a.akamaihd.net%2Fsteamcommunity%2Fpublic%2Fimages%2Fclans%2F30409173%2Fb9b3b344751f4354c32f365e0576934b7bacec2c.jpg Before releasing any info about 5th era, lets make the Mashinky gameplay a bit more interesting and challenging and train management a bit easier :) There is a new update, where I've implemented 2 new features: - Train aging (both visual and gameplay) - Mass train replacement (requested by the community for a long time) Train Aging - Train has an age now. This affects fuel consumption speed (mainteinance cost) - Train age is visible also by icons colors - All aged engines / wagons can became rusty (procedural rust rendering) - These two features (mainteinance cost and rustyness are optional) Mass train replacement - System for planning train replacement! - Accessible by train list window, depot window or train details window - Persistent list...