Bug 295981 [Forms] FormImages & FormFonts are not disposed correctly
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/forms/widgets/Section.java
* @return the title bar background
	 */
	public Color getTitleBarBackground() {
		if (titleColors == null)
			return null;
		return (Color) titleColors.get(COLOR_BG);
	}
	private void putTitleBarColor(String key, Color color) {
		if (color == null)
			return;
		if (titleColors == null)
			titleColors = new Hashtable();
		titleColors.put(key, color);
	}
	protected void onPaint(PaintEvent e) {
		Color bg = null;
		Color fg = null;
		Color border = null;
		GC gc = e.gc;
		Image buffer = null;
		Rectangle bounds = getClientArea();
		if ((getExpansionStyle() & TITLE_BAR) != 0) {
			buffer = new Image(getDisplay(), bounds.width, bounds.height);
			buffer.setBackground(getBackground());
			gc = new GC(buffer);
		}
		if (titleColors != null) {
			bg = (Color) titleColors.get(COLOR_BG);
			fg = getTitleBarForeground();
			border = (Color) titleColors.get(COLOR_BORDER);