function callback(key, value) {
		switch (key) {
			case "scroll-settings":
				appSettings.uiSettings[key].show();
				break;

			case "editorFont":
				fonts.setFont(value);

			default:
				appSettings.update({
					[key]: value,
				});
				break;
		}
	}
Callback for settings page when an item is clicked
@param {string} key
@param {string} value