Provides better nightvison. Attemted to be balanced for a vanilla+ experience.

Changes:
Original Nightvision unchanged
Nightvision MK2 has a gridsize of 2x1 and improved nightvision
Nightvision MK3 has a gridsize of 1x1 and improved nightvision almost inline with daytime
- removed switch-on noise for MK2 and MK3

Adds the following equipment:
- Nightvision MK2
- Nightvision MK3