[FIX] Reset CameraControl default values when followPointer config is dynamically changed

[Kurtil]

Use case:

• I added a UI button to switch cameraControl.followPointer on and off (true/ false).
  => The dolly rate when followPointer is false is not consistent.

Steps to reproduce the issue:

• dolly using the mouse wheel on an object when cameraControl.followPointer is true. (it sets the dollyDistFactor to a computed value)
• change the cameraControl.followPointer to false.
  => the distance from the previous object influences the dolly rate because dollyDistFactor is not reset to 1.