(A-compU+8840): New abstract node.

(A-cgnU+8840): Changed from U+8840; add `<-denotational@component' for
A-compU+8840.
(AJ1-01858): Unify U+8840 instead of UU+8840; delete `=>ucs@iwds-1';
use A-cgnU+8840 instead of U+8840 as its mother.
(U+8840-itaiji-002): Use A-cgnU+8840 instead of U+8840 as its mother.
(U+8842): Add `ideographic-structure'.
(A-IWDSU+8846): Add ideographic-structure.
(U+8846-itaiji-005): Unify GT-K09782.
(A-GT-K09783): New abstract node; use `<-denotational' for U+8846;
unify A-U+8846-itaiji-009.
(U+8846-itaiji-009): Use `<-subsumptive' for A-GT-K09783 instead of
`<-denotational' for U+8846.
(GT-K09783): New character; use `<-denotational' for A-GT-K09783.
(U-000275CA): Apply new conventions for glyph granularity.