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.schematic/src/org/eclipse/birt/report/designer/ui/editors/pages/ReportXMLSourceEditorFormPage.java
public static final String ID = "BIRT.XMLSourceFormPage"; 
	private ActionRegistry registry;
	private FormEditor editor;
	private Control control;
	private int staleType;
	private int index;
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.forms.editor.IFormPage#initialize(org.eclipse.ui.forms.editor.FormEditor)
	 */
	public void initialize( FormEditor editor )
	{
		this.editor = editor;
		setRangeIndicator( new Annotation(){} );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.forms.editor.IFormPage#getEditor()
	 */
	public FormEditor getEditor( )
	{
		return editor;
	}
	public void doSave( IProgressMonitor progressMonitor )
	{
		super.doSave( progressMonitor );
		IReportProvider provider = EditorUtil.getReportProvider( this,
				getEditorInput( ) );