Revert "モーダルウィンドウの初期描画不具合の修正"

This reverts commit c08e6ed64b8223b9193c2aa77e8bcc2292b1a035.
Revert c08e6ed..2224ea5

This rolls back to commit c08e6ed64b8223b9193c2aa77e8bcc2292b1a035.