Blender Git Loki

Fix Edit Voxel Size label rotation and scale in rotated objects

Previously, the text rotation was always calculated in object space, so
the text rotation always had the object rotation applied. Now the
rotation is calculated in world space, so it always aligns correctly to
the view. Same applies to text scale not taking into account the object
position.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D8068