Optimizations and FPS improvements — Balkan Bloodbath Steam update #854357

Some players were having worse/unstable FPS at times, this was due to many things trying to access important arrays in memory at the same time. This has mostly been improved. Changed backend to make sure AIs don't do actions too much at the same time to eat away at the engine's memory limit. Changed how the stock market runs in the backend so it is more memory optimized. General improvements to how nation data is showcased along with other stuff. for memory optimizations. Auto save happens every 180 seconds instead of 60. Players shouldn't see any bumps in performance outside the first 2 seconds of loading into the game