Mirror symmetry unify the way paths/shapes/groups are handled

Mirror symmetry currenty has some problems with some situations so sometimes it create closed paths and other open ones over the split line To fix it we add a versioning to now broke existing works And handle correctly in the future (I select the most often situation that is close the path)

This fix is targeted for 1.0.2 for 1.1 I do another tweak that allow open and closed paths over the split line.