(U-000244DA): Use it instead of A-M-19638; omit `<-denotational' for

(U-000244DA): Use it instead of A-M-19638; omit `<-denotational' for
A-M-19638.
(A-MJ040193): Use it instead of G-M-19638; unify A-M-19638; use
`<-denotational' for U-000244DA.
(M-19638): Use A-MJ040193 instead of G-M-19638 as the mother; unify
MJ040193 and KOSEKI-221170; apply new conventions for glyph
granularity.
(A-IU+244DA): Use it instead of U-000244DA; use U-000244DA instead of
A-M-19638 as the mother.
(IU+244DA): Omit `<-unknown' for M-19638.