Method addButtonInput

src/webpage/settings.ts:1549–1554

(label: string, textContent: string, onSubmit: () => void)

	addSelect(
		label: string,
		onSubmit: (str: number) => void,
		selections: readonly string[],
		{defaultIndex = 0, radio = false} = {},
	) {
		const select = new SelectInput(label, onSubmit, selections, this, {
			defaultIndex,
			radio,
		});
		this.options.push(select);