Merge topic 'fix_2D_line_interactor_uncertainty_issue'

2fa89c29 Fix line widget translation interaction bug
81b26829 Add the substract and multiply operations to vtkVector

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Reviewed-by: Mathieu Westphal (Kitware) <mathieu.westphal@kitware.com>
Reviewed-by: Thomas Galland <thomas.galland@kitware.com>
Merge-request: !10683