Make light kit default
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
The light kit set of lights should be on by default and the "default light" should be off by default.
And since the naming sounds weird, on the pq3DViewPropertiesWidget, the "Default Light" label should be changed to "Headlight" and the "Light Kit Parameters" label should be changed to simply be "Light Kit".