(U+7240): Apply new conventions for glyph granularity.

(U+7240): Apply new conventions for glyph granularity.
(U+7241): Likewise.
(U+7242): Likewise.
(U-0002457F): New character.
(M-19780): Add `<-denotational' for U-0002457F; add
`ideographic-structure'.
(U-00024580): New character.
(M-19781): Add `<-denotational' for U-00024580; unify IU+24580.
(U-0002AE9E): New character.
(A-IWDSU+24584): Changed from A-cgnU+24584.
(U-00024584): Use A-IWDSU+24584 instead of A-cgnU+24584 as its mother;
apply new conventions for glyph granularity.
(U-0002458A): Likewise.
(U-00024588): Likewise.
(U-00024591): New character.
(A-IU+24596): Changed from o-IU+24596.