Train aging and Mass replacement

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 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)


- System for planning train replacement!
- Accessible by train list window, depot window or train details window
- Persistent list of replacement rules. Once applied to any train, train heads to neares depot, process replacement and get back to its routelist. If not enough tokens, train waits until enough tokens gathered and displays warning message.
- You can cancel replacement order by pushing the same replacement button again


- First and very simple version of bug management system!
- Also comes with rating system, where you can upvote (raise priority) for any bug instead of creating duplicates
- It is quite WIP now, so this will be improved in the future a lot.


- Improved Script function AreConnectedByTrack, GetNumTracksVersion, UpdateTextFormat, GetName, GetNumTracks
- Possibility to Unsubscribe Steam workshop ingame
- Rebalancing (City grow speed via passengers)
- New version of localized texts
- Scripts iteration and fixes
- Scenarios do not save mod ids (workaround until proper UI implemented)
- New game do not shows missing mods warning
- Music multiple tracks play together
- Crash related to click on status bar
- Signals refresh when ignore & pass one-way signal in opposite direction
- Recommended train weight independent on multiple locos order
- One depot limit no more applied in editor
- Drag drop wagons in depot keeps all wagon params
- Wagons without outcome are not affected by age
- Town doesn't grow when starting new scenario

Hope you like this update! Just let me know in comments ;)
Next stop (hopefully) some first info about 5th era, because if everything goes well, it's gona be awesome! :)

Best regards,
Jan