Bug 245457 [Forms] ExpandableComposite should have option of not drawing the title focus box
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/forms/widgets/ExpandableComposite.java
* @param expanded
	 *            the new expanded state
	 */
	public void setExpanded(boolean expanded) {
		internalSetExpanded(expanded);
		if (toggle != null)
			toggle.setExpanded(expanded);
	}
	/**
	 * Performs the expansion state change for the expandable control.
	 * 
	 * @param expanded
	 *            the expansion state
	 */
	protected void internalSetExpanded(boolean expanded) {
		if (this.expanded != expanded) {
			this.expanded = expanded;
			if (getDescriptionControl() != null)
				getDescriptionControl().setVisible(expanded);
			if (client != null)
				client.setVisible(expanded);
			layout();
		}
	}
	/**
	 * Adds the listener that will be notified when the expansion state changes.
	 * 
	 * @param listener
	 *            the listener to add
	 */