4.1.2
add 'none' infill type
refactor animation control bar, re-add axis positions
stub in thin type 3 test (experimental code)
move thin wall types into functions
fix stored tab rotation quaternions
fix pocket outline only with thru holes
fix rendering of cnc tool shafts
fix index mode change order of ops to allow clearning of animation artifacts
fix ams info label text alignment. add button hover title
fix legacy slice/top conversion
fix type 1 thin wall