0.2.15 - HVSS (Geometrics Alpha) — Sprocket Steam update #139347

Hi all, Reimplemented horizontal volute spring suspension (HVSS) in this one. Fixes Fixed wheel mass not being applied in the physics simulation. (Introduced in 0.2.x) A broken angle slider for the roadwheels is no longer shown. Fixed overly large antenna hitbox. Fixed laying drives losing all torque when not manned by a crewman. This caused the gun to lower between shots if the gun layer was also assigned to loading. Fixed model selection (track belts, wheels, muzzle brakes, etc) not supporting undo/redo. Fixed the default vehicle's tracks not being selectable until the tracks have their first change made. Changes Increased suspension physics simulation accuracy for all physics quality settings. The CPU impact shouldn't be noticeable, but let me know if you notice anything. Suspension damping now has more of an effect on the vehicle. HVSS is now always perfectly centred on the track bel...