It was a bit odd having `ED_view3d_grease_pencil_selection_domain_get` in the `ED_view3d.h` header. Moving it to `ED_grease_pencil.h` makes more sense.
It was a bit odd having `ED_view3d_grease_pencil_selection_domain_get` in the `ED_view3d.h` header. Moving it to `ED_grease_pencil.h` makes more sense.