new position property for packages

On the "dawn" of the new packages feature I already have a feature request:
The example packages are rotating and mirroring on the origin of the package, which is not in the center but on the top left corner.

Is it possible :
- to either give the background of the packageB itself a position, or
- to have a center point property to define the rotation point?

By this, the developer of the package could adapt the result of rotation and mirroring.

Ok, i will have a look.