NightVision - Don't apply AimDownSightsBlur on optics with integrated night vision

[commy2]

When merged this pull request will:

• fix NVS scope has blur #6666 super satan
• replace close NightVision - Fix NVS blur #6942

To explain: If the Magnification is > 3, we can safely assume that we're not looking down iron/holo/cqb sights, but are instead dealing with an optic with actual (!= from RMB zoom) magnification and thus integrated night vision (potentially with its own blur effects).

We need to refresh the effect every time magnification is changed from <3 to >3 and vice versa, as there is no OpticsMode event.

[commy2]

This was tested with BWA3_optic_ZO4x30_RSAS_NSV (optic with hmd nvg compatible CQB holo optics mode, and internal nvg scope optics mode) and it works as expected: blur only applied on CQB.