Blender Git Loki

* removed some arbitrary range limits on property values
* turned some slider UI controls back into number fields

Note: Sliders should only be used when representing a property that's
conceptually a percentage or ratio. For arbitrary numbers, use a number field.

For example, a lamp's energy can theoretically be anything - 0.1, 3.5, 125.0, it
doesn't matter - it's just a number, not a percentage. So this should be a
number field.