Bug 134988 [regression]Available items in Query didn't change when change data source in Edit Data Set Dialog.
Description: Available items in Query didn't change when change data source in Edit Data Set Dialog. Steps to reproduce: 1. New two different data sources. 2. New a dataset, change data source, view Available Items in Query pane. Expected result: Available Items in Query pane changed according to new Data source. Actual result: Available Items in Query pane kept unchanged.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/property/AbstractPropertyDialog.java
messageArea.setTitleLayoutData( messageData );
		messageArea.setMessageLayoutData( messageData );
		return messageComposite;
	}
	
	private final boolean showPage( PropertyNode node )
	{
		if ( currentNode != null )
		{
			
			if ( !currentNode.getPage( ).canLeave( ) )
			{
				return false;
			}
		}
		
		if ( !node.isPageControlCreated( ) )
		{
			
			Control control = node.createPageControl( propertyPane );
			assert ( control != null ) : "Control has not been created for node " + node.getId( ); 
		}
		currentNode = node;
		
		propertyPaneLayout.topControl = node.getPageControl( );
		
		node.getPage( ).pageActivated( );
		propertyPane.layout( );
		return true;
	}