Simple Trains 0.6.2 Mechanism Fix Beta 4

TURNTABLE CONTROL FIX
- The turntable no longer rotates when clicking arbitrary parts of its large entity footprint.
- Rotation is authorized only when the player is actually aiming at the gold controller on the control pedestal.
- Clicking/aiming at a locomotive on the turntable forwards the interaction to that locomotive, so it can be mounted normally.
- Clicking the remaining turntable structure returns PASS and does not rotate it.
- Train-side automatic forwarding to the turntable has been disabled.
- Keeps Beta 3 StackMapFrame hotfix and all 0.6.2 mechanism fixes.
