Plugins [Experimental] Cloth CUA

• Added logic to save and restore geometry so that it doesn't have to be recreated each time.
• Added logic to save and restore presets
  • Geometry and presets are saved into different files to allow sharing of geometry between presets.
    • The last saved/loaded geometry gets set on the preset.
  • Material options should also save/load correctly

Saving and loading in scene should also work. As always, let me know if you see bugs

• Added controls for materials
  • Can select from the standard shader (has tesselation) or transparent shader.
  • Material options now controlled by separate UI
• Fixed issue where disabling and re-enabling the atom would zero its position
• No longer requires a Person atom to be present in scene to work