(U-00021D6F): Apply new conventions for glyph granularity.

(U-00021D6F): Apply new conventions for glyph granularity.
(U+5CB8): Likewise.
(S-1964): Unify U+5CB8-var-001.
(U+5CD0): Apply new conventions for glyph granularity.
(A-cgnU+5D57): New abstract node.
(U+5D57): Add `<-denotational' for A-cgnU+5D57; add
`ideographic-structure' and `ideographic-structure@apparent'.
(UU+5D57): Delete `=>ucs@iwds-1'; modify `ideographic-structure' to
represent functional structure; add `ideographic-structure@apparent'.
(HNG-KHM0072-0): Use A-cgnU+5D57 instead of U+5D57 as its mother; add
`<-HNG@chise' for U+5D57.