Revert "normalize->fitToContentsにリネーム"

This reverts commit 0ea89ba4ea028f36b146609c49b384d33ea5ff8b.
Revert "DividedBoxの機能拡張 　StateBoxを考慮 　resize実装 　normalize, minimize, maximize, hide　を実装"

This reverts commit ec9973db0c2fdf86e6d8839b0043fb39edb9e2e3.