Bug 192171 Layout still display css style from library after removing library.[01]
Description: Layout still display css style from library after removing library. Build number:2.2.0.v20070612 Steps to reproduce: 1. Add a css file in Library Explorer 2. New a library file. 3. Use css file in library default theme. 4. New a report and use the library. 5. Insert a label and apply the style from library. 6. Remove the library in report Outline. Expected result: Style effect disappears from label in Layout. Actual result: Label in Layout still displays the style effect. Error log:N/A
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/ReferenceableElementAdapter.java
* 
	 * @see org.eclipse.birt.report.model.core.IReferencableElement#getClientList()
	 */
	public List getClientList( )
	{
		return new ArrayList( clients );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.IReferencableElement#hasReferences()
	 */
	public boolean hasReferences( )
	{
		return !clients.isEmpty( );
	}
	/**
	 * Broadcasts the event to clients.
	 * 
	 * @param ev
	 *            the event to broadcast
	 * @param module
	 *            the module
	 */
	protected void broadcastToClients( NotificationEvent ev, Module module )
	{
		for ( int i = 0; i < clients.size( ); i++ )
		{
			BackRef ref = (BackRef) clients.get( i );
			DesignElement target = ref.element;