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
* @param element
	 *            the styled element
	 */
	public ReferenceableElementAdapter( ReferencableStyledElement element )
	{
		this.element = element;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.IReferencableElement#doClone(org.eclipse.birt.report.model.elements.strategy.CopyPolicy)
	 */
	public Object clone( ) throws CloneNotSupportedException
	{
		ReferenceableElementAdapter adapter = (ReferenceableElementAdapter) super
				.clone( );
		adapter.clients = new ArrayList( );
		return adapter;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.IReferencableElement#addClient(org.eclipse.birt.report.model.core.DesignElement,
	 *      java.lang.String)
	 */
	public void addClient( DesignElement client, String propName )
	{
		clients.add( new BackRef( client, propName ) );
	}
	/*