Cleans up references. Directional sprites for computers, finally.

[PetMudstone]

Purpose

• Cleans up additional references to use new .prefabs.
• Made more .prefabs use DirectionalSpritesV2.cs
• Finally gave computers directional sprites, fixes Directional sprites for computers, computer screens, and computer frames. #4469 (doesn't do anything about Computer frame needs different sprites depending on construction state. #4705 sadly).
• Added placeholder security camera consoles and boards.

Notes:

• The screen and keyboards for the nuclear reactor and shuttle piloting consoles need proper directional sprites.
• Computers don't maintain the direction that computer frames used to make them had. Likewise, computer frames don't maintain the direction that computers that get turned into them had.

Changelog:

CL:Computers and their frames now have directional sprites.

[corp-0]

can you add the line: fixes #4469 so it autocloses when merged?

Nice to see the first PR using the changelog :D

[corp-0]

Missing reference found in prefab TabPipeDispenser component Object field Sprite

One missing reference away from merging