Remove exp hint of a few properties

[MewPurPur]

EditorSpinSlider, used for our properties, extends Range, and it likewise doesn't work if min is 0 or less, yet we have a few dozen properties that use exp and start with 0.

I wanted to add support for some kind of exponential easing without these restraints, but I'm not sure if I'll finish it, so I just wanted to start with removing a few "exp" hints where exponential easing doesn't make much sense.

First is CameraAttributes, where the min value of DOF near/far transition is -1 and so the exp hint didn't work in the editor. I assume -1 is something representing an invalid value.

Second is CSGShape, where the min value of angle simplification is 0, meaning no angle simplifications will be made. I get how you're likely to want smaller angle simplifications rather than big ones towards the max value 180, but I don't think exponential easing makes sense here, as it's something you use when different common values of a property are orders of magnitude apart.

[Calinou]

This makes sense. Depth of field transition values are distances, not attenuation falloffs, so they shouldn't be configured as exponential.

Likewise, angles are not falloffs either, so it makes sense to remove the hint for Path Simplify Angle too.

[akien-mga]

Thanks!

[YuriSizov]

Cherry-picked for 4.2.1.