Bug 134479 Edit in XML Source cannot be reflected in Layout.
Description: Edit in XML Source cannot be reflected in Layout. Steps to reproduce: 1. New a report parameter with default value "value1" and save 2. Click XML Source, delete <property name="defaultValue">value1</property> and save. 3. Back to Layout, open parameter edit dialog Expected result: Default value is empty. Actual result: Default vlaue was still "value1", tried to change it to other values but Layout didn't detected the change.
UI/org.eclipse.birt.report.designer.ui.editors.schematic/src/org/eclipse/birt/report/designer/ui/editors/pages/ReportMasterPageEditorFormPage.java
updateStackActions( );
		}
		return true;
	}
	/**
	 * Rebuild report design model.
	 * 
	 * @param oldModel
	 */
	protected void rebuildReportDesign( Object oldModel )
	{
		
		WrapperCommandStack stack = (WrapperCommandStack) getCommandStack( );
		if ( stack != null )
		{
			stack.removeCommandStackListener( getCommandStackListener( ) );
			stack.setActivityStack( getModel( ).getCommandStack( ) );
			stack.addCommandStackListener( getCommandStackListener( ) );
		}
		
		SessionHandleAdapter.getInstance( ).resetReportDesign( oldModel,
				getModel( ) );
		SessionHandleAdapter.getInstance( ).setReportDesignHandle(
				getProvider( ).getReportModuleHandle( getEditorInput( ) ) );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.forms.editor.IFormPage#initialize(org.eclipse.ui.forms.editor.FormEditor)
	 */