(UU+5F50): Unify U-0002B739.

(UU+5F50): Unify U-0002B739.
(U-00022451): Add `sound@ja/on'.
(IU+22451): Add `<-same' for UU+591A.
(A-cgnU+38C7): Modify structure; preserve the previous IDS as an
apparent structure.
(U+38C7): Likewise; add `<-denotational@usage' for A2-DJT-03090.
(U+38C7-itaiji-005): Modify structure; preserve the previous IDS as an
apparent structure.
(A-U+38C7-itaiji-011): Likewise.
(A-U+38C7-itaiji-012): Likewise.
(A-U+5F56-itaiji-003): Use `ideographic-structure@apparent' instead of
`ideographic-structure'.
(A-U+38C7-itaiji-009): Likewise.
(U+38C7-itaiji-008): Likewise.
(U+38C7-itaiji-009): Likewise.
(U+38C7-itaiji-010): Add `ideographic-structure' and
`ideographic-structure@apparent'.
(A2-DJT-03090): New abstract node.