When adding multiple force fields of different types they are all called
"Field", making it difficult to tell them apart.
Lights were already named based on their type. This follows the light
code.
New names:
- Force
- Vortex
- Magnet
- Wind
- Guide
- TextureField
- Harmonic
- Charge
- Lennard-Jones
- Boid
- Turbulence
- Drag
- Fluid
- Field
Reviewed by: Julian Eisel
Differential Revision: https://developer.blender.org/D8420