(U+3ECE): Add `sound@ja/on'; unify MJ002510, BC-85AA, KOSEKI-235650

(U+3ECE): Add `sound@ja/on'; unify MJ002510, BC-85AA, KOSEKI-235650
and M-21017; add `<-ancient' and `<-formed' for U+745F.
(U+745F): Add `ideographic-structure'.
(U-00024AC9): Add `ideographic-structure'; add `sound@ja/on'; unify
MJ041119, KOSEKI-239340 and M-21348.
(U-00024ACC): Add `ideographic-structure'; unify M-21353; add `<-same'
for U+74B5.
(U-00024ACD): Add `ideographic-structure'; add `sound@ja/on'; unify
MJ041123, KOSEKI-239380 and M-21354; add `<-ancient' for U+7434.
(U-00024AD4): Add `ideographic-structure'; unify M-21356; add
`<-original' for M-21281.
(U-00024AD5): Apply new conventions for glyph granularity.