(U+5338): Unify BC-8A70; add `hanyu-dazidian-vol',

(U+5338): Unify BC-8A70; add `hanyu-dazidian-vol',
`hanyu-dazidian-page' and `hanyu-dazidian-char'.
(C3-2466): Unify BC-8CD3; add `hanyu-dazidian-vol',
`hanyu-dazidian-page' and `hanyu-dazidian-char'; add
`ideographic-structure'.
(U+533C): Separated from C2-2558 and moved from
Ideograph-R022-Right-Open-Box.el.
- Use char-spec instead of char-ref as operators in
  `ideographic-structure' properties.
- Add some missing `ideographic-structure'.
- Add some `hanyu-dazidian-vol', `hanyu-dazidian-page' and
  `hanyu-dazidian-char' properties.