When displaying the voxel size for an adaptive domain the resolution of the adaptive domain was used to calculate the world size of the voxel.
This patch changes this to use the initial size of the domain.
When using adaptive domain the overlay was not rendered in the right
place.
Thanks to sebbas for part of the patch!
Reviewed By: sebbas, fclem
Differential Revision: https://developer.blender.org/D6076
9d228c688d