Fix "boundary=administrative without admin_level" and various validation errors

Improve tagging; fix "missing tag boundary=administrative without admin_level"; this element is member of a boundary relation, no need for an admin level tag in itself, as the relations already have it.

Fix "missing tag boundary=administrative without admin_level"; fix wikidata; fix self-intersection

Improve tagging; fix "missing tag boundary=administrative without admin_level"; this element is member of two boundaries relations, no need for an admin level tag in itself, as the relations already have it.

Improve tagging; fix "missing tag boundary=administrative without admin_level"; this element is member of two boundaries relations, no need for an admin level tag in itself, as the relations already have it.

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Fix "source:geometry on a node"

Improve tagging; fix name

Improve tagging; fix name

Improve tagging; fix name