void setItemBackground () {
		if (!instance.startup) {
			table1.getItem (0).setBackground (itemBackgroundColor);
		}
		/* Set the background color item's image to match the background color of the item. */
		Color color = itemBackgroundColor;
		if (color == null) color = table1.getItem (0).getBackground ();
		TableItem item = colorAndFontTable.getItem(ITEM_BACKGROUND_COLOR);
		Image oldImage = item.getImage();
		if (oldImage != null) oldImage.dispose();
		item.setImage (colorImage(color));
	}