Re-enable main cam on start mission

ClockCam.cs has main camera disabled, and clock cam enabled, whilst in trigger area. Swaps back once player leaves the area. Problems:

Player can only see clipboard UI once clock cam is enabled. (can't see player forklift)
Players need to physically leave the trigger area for the cameras to change back, which isn't obvious since they cannot see their forklift. Solutions:
Once player presses 'Start', main cam is re-enabled.

Zeeblur / ForkliftFrenzy