Committing this for the sake of completionism. I'm going to bring this
up for review, I think we may want to revert it.
Fundamentally I'm changing the behaviour of the operator both in object
mode (acting on all selected lattice objects), as well as the edit mode
(acting on all lattices in edit mode, regardless of them having any
selected vertice).
Committed by accident (1076523b1b).
But now I need to fix building.
Note: The operator itself shouldn't have been committed because it
should operate in the world space (for the axis), not local.
I will tackle this later.
