Fixed wirelink and entity outputs not duping correctly

Fixes #698
Made cam controller reset FOV if FOV input is 0

Fixes #699
cam controllers parent visibility fix now uses parent's color and material
Fixed constant value vector
might have fixed an error that is hard to reproduce

Trying to fix an error that is very hard to reproduce. It has something
to do with laggy servers and the entity not existing yet or its overlay
not being sent yet or something. Hopefully this will fix it.