Bug 145303 Parameter dialog didn't show the property change in XML Source
Steps to reproduce: 1.New a string parameter with default value "aaa" 2.Switch to XML Source, change its default value to "bbb" 3.Switch to layout, open the parameter dialog in data explorer Expected result: Default value is changed to "bbb" Actual result: Default value is still "aaa"
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
* 
	 * @param input
	 */
	protected void sanityCheckState( IEditorInput input )
	{
		if ( fModificationStamp == -1 )
		{
			fModificationStamp = getModificationStamp( input );
		}
		long stamp = getModificationStamp( input );
		if ( stamp != fModificationStamp )
		{
			
			
			fModificationStamp = stamp;
			handleEditorInputChanged( );
		}
	}
	/**
	 * Handles an external change of the editor's input element. Subclasses may
	 * extend.
	 */
	protected void handleEditorInputChanged( )
	{
		String title = Messages.getString( "ReportEditor.error.activated.outofsync.title" ); 
		String msg = Messages.getString( "ReportEditor.error.activated.outofsync.message" ); 
		if ( MessageDialog.openQuestion( getSite( ).getShell( ), title, msg ) )
		{
			IEditorInput input = getEditorInput( );
			if ( input == null )