Allow 3D editing of bounding boxes

[bauerdavid]

Is your feature request related to a problem? Please describe.
Sometimes bounding boxes are used to annotate some objects in 3D image data. It might happen that on adding a bounding box, it does not fit the object. This can be corrected by changing to a different projection, however, it can be time consuming.

Describe the solution you'd like
We could add drag boxes also to the 3D viewer to every face of the bounding box (similar to 2D, where these are placed on edges).

Describe alternatives you've considered
We might add these also to edges and corners, but these might be hard to edit. I think editing faces will be sufficient.