Method createButton

src/gui/MathModal.ts:112–121

(
		container: HTMLElement,
		text: string,
		callback: (evt: MouseEvent) => unknown
	)

	}

	private createButton(
		container: HTMLElement,
		text: string,
		callback: (evt: MouseEvent) => unknown
	) {
		const btn = new ButtonComponent(container);
		btn.setButtonText(text).onClick(callback);

		return btn;
	}

	private createButtonBar(mainContentContainer: HTMLDivElement) {
		const buttonBarContainer: HTMLDivElement =