Method FindOrMakeSubitem

src/menu.cpp:421–427

		: displayname(displayname), command(command) { }

		WorkItem *FindOrMakeSubitem(std::string const &name) {
			auto sub = std::find_if(subitems.begin(), subitems.end(), [&](WorkItem const &item) { return item.displayname == name; });
			if (sub != subitems.end()) return &*sub;

			subitems.emplace_back(name);
			return &subitems.back();
		}

		void Sort() {
			if (command) return;