Merge branch 'tighten-subid-check' into 'master'

Oliver Sanderrequested to merge
cherry-pick-e2bb0eef into releases/2.7

Bugfix in UGGridIdSet::id method for facets of 3d elements

See merge request !430 (merged)

(cherry picked from commit e2bb0eef)

7368fb0c Bugfix in UGGridIdSet::id method for facets of 3d elements

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