Bug 130495 Get rid of SessionHandleAdapter
Now, we use SessionHandleAdapter to keep current active report deisng. That's a bad practive for editor swith and rebuild will cuase lots of problmes. Need find way to replace it.
UI/org.eclipse.birt.report.designer.ui.lib/src/org/eclipse/birt/report/designer/ui/editors/LibraryLayoutEditor.java
{
	private IEditorPart parentEditorPart;
	public LibraryLayoutEditor( )
	{
		super( );
	}
	/**
	 * @param parent
	 */
	public LibraryLayoutEditor( IEditorPart parent )
	{
		super( parent );
		this.parentEditorPart = parent;
	}
	public boolean isSaveAsAllowed( )