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* beginning updates to surface manipulator intersect Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com> * initial changes to support surface manipulator being able to ignore custom entity ids Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com> * updates to use type aliases Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com> * add test for self-intersection test for SurfaceManipulator when holding Ctrl Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>