Interim patch to 1.45a — Production Line : Car factory simulation Steam update #560362

I fixed the save game bug, so rushed this out there. As a result, the 8 new achievements dont have artwork yet... 1) New window above each production line-start shows the currently produced car, to draw attention to where the scheduler can be edited. 2) Reduced volume of R&D SFX. 3) Fixed incorrect warning icon about unselected car features when loading a game. 4) Player no longer warned about pre-researched features like visual inspection or emissions checks not being enabled. 5) Player no longer warned about missing but incompatible options such as bullbars on a sedan. 6) Slot details window bottom tabs now dynamically resize to fit content. 7) Some improvements to where the slot error messages appear and what they say. 8) Empty office tiles are now highlighted o...