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.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
{
			if ( part instanceof PageBookView )
			{
				PageBookView view = (PageBookView) part;
				if ( view.getCurrentPage( ) instanceof DesignerOutlinePage )
				{
					ISelectionProvider provider = (ISelectionProvider) view.getCurrentPage( );
					ReportRequest request = new ReportRequest( view.getCurrentPage( ) );
					List list = new ArrayList( );
					if ( provider.getSelection( ) instanceof IStructuredSelection )
					{
						list = ( (IStructuredSelection) provider.getSelection( ) ).toList( );
					}
					request.setSelectionObject( list );
					request.setType( ReportRequest.SELECTION );
					
					
					
					SessionHandleAdapter.getInstance( )
							.getMediator( )
							.notifyRequest( request );
					SessionHandleAdapter.getInstance( )
							.getMediator( )
							.pushState( );
				}
			}
			if ( getActivePageInstance( ) instanceof GraphicalEditorWithFlyoutPalette )
			{
				if ( ( (GraphicalEditorWithFlyoutPalette) getActivePageInstance( ) ).getGraphicalViewer( )
						.getEditDomain( )