It was visible until the first dialog ended, so a scene entered without a
running scenario (a loaded save on an RPG map, the return from a battle)
showed an empty box that nothing closed. SetDialogQueueAndRun shows it.
Mods are renamed by role (shell2d_base, menu_base, ui_base, live2d_base,
editor_tools, cthangover_story, cthangover_murakami, cthangover_party) and
every reference follows. Engine UI prefabs (dialog, answers, message, game
menu, inventory, map, skills) and their panel entries moved out of the story
mod into the subsystem mods; the card_novel and vn_starter_novel collections
are removed.