(A-IWDSU+4EBA): New abstract node to represent IWDS1-146,237.

(A-IWDSU+4EBA): New abstract node to represent IWDS1-146,237.
(U+4EBA): Use A-IWDSU+4EBA instead of A-compU+4EBA as a target of
`<-denotational@component'.
(IWDS1-146): Unify A-IWDSU+201A2 instead of A-compU+4EBA; add
`<-denotational@component' for A-IWDSU+4EBA.
(U-000201A2): Add `<-denotational@component' for IWDS1-146.
(A-IWDSU+4EBC): Use A-IWDSU+4EBA instead of IWDS1-146 in
`ideographic-structure'.
(U+4EBD): Ditto.
(A-IWDSU+5166): Ditto; use `<-denotational@usage' instead of
`<-denotational' for BUCS+4EA1.
(A-IWDSU+4ED0): Use A-IWDSU+4EBA instead of IWDS1-146 in
`ideographic-structure'.
(U+3431): Ditto.
(U+4EFA): Ditto.
(U+4F1E): Ditto.
(U-0002A72C): Ditto.
(A-GT-K05990): Ditto.
(U+501D): Ditto.
(U+5098): Ditto.