(IWDS1-0007): Add `<-denotational' for A-cgnU+6236; unify

(IWDS1-0007): Add `<-denotational' for A-cgnU+6236; unify
A-IWDSU+6236.
(A-cgnU+6236): New abstract node.
(U+6238-itaiji-003): New character; use `<-denotational' for
A-cgnU+6236.
(U+6237): Unify MJ057544, KOSEKI-131810 and GT-14740.
(U-00022A25): Apply new conventions for glyph granularity.
(GT-14744): New character; use `<-denotational' for U-00022A25.
(U-00022A27): New character.
(U-00022A28): New character.
(U+623A): Apply new conventions for glyph granularity.
(U-00022A2A): Likewise.
(U-00022A2B): New character.
(A-IWDSU+623B): New abstract node.
(U+623B): Add `<-denotational' for A-IWDSU+623B.
(U+623E): Ditto.
(U-00022A38): Apply new conventions for glyph granularity.
(A-GT-K08951): New abstract node.
(GT-K08951): New character; use `<-denotational' for A-GT-K08951.
(U-00022A58): Apply new conventions for glyph granularity.
(U-00022A5A): New character.
(U-00022A5E): New character.