wip/runtime2: Widget dragging doesn't work right with right-handed models

wip/runtime2:

Widget dragging doesn't work right with right-handed models.

Import e.g. the car model from WS17_Cluster, which uses right handed orientation, and give the top "Car" group miscellaneous translation, rotation, and scale. Then try translating, rotating, and scaling the car model object itself. Translation and scaling seems to work reasonably well, though sometimes Z-axis seems to point to slightly different direction than scaling/translation happens. Rotation is completely broken, though.