Method newPanel

js/Post.js:24–34

* Create a new panel for the post. Add it to the end of the list of existing panels.

()

	 * Create a new panel for the post. Add it to the end of the list of existing panels.
	 */
	newPanel() {
		const newSign = new Sign();
        newSign.newSubPanel();
		
		
		const newPanel = new Panel(newSign, undefined);
		const exitTab = new ExitTab();
		newPanel.exitTabs.push(exitTab);

		this.panels.push(newPanel);
	}

	/**
	 * Duplicate an existing panel. Add it immediately after the panel being duplicated.