When multiplying objects or inserting objects in the scene that do not fit in the buildplate, those
objects would correctly end up outside the buildplate, but their Z position would be aligned at the
absolute Z=0 of the buildplate.
This commit fixes that by compensating in the z-axis, properly moving the object outside the
buildplate in the correct z-position so that it's bottom is aligned with the original object.
CURA-7440
Also improve the filtering a bit so that it's no longer dependent on the order. Doesn't really matter in this case but it should be more robust.
Contributes to issue CURA-7754.
