Shape Overall Scale Epic

[akenmorris]

This is the parent issue for all overall scale issues for ShapeWorks.

• Studio: Glyph Slider needs to dynamically adjust to overall shape scale #2459
• Optimization: Image spacing greatly affects surface sampling #1227
• ShapeWorks Scale Invariance and Adaptive Particle Splitting #670
• Groom: Blur needs to be spacing aware #2461