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
if ( item == null )
						viewer.getTree( ).setToolTipText( "" );
					else
					{
						String text = null;
						if ( item.getData( ) instanceof PropertyNode )
						{
							text = ( (PropertyNode) item.getData( ) ).getPage( )
									.getToolTip( );
						}
						viewer.getTree( ).setToolTipText( text );
					}
				}
			}
		} );
		viewer.setContentProvider( new PropertyContentProvider( ) );
		viewer.setLabelProvider( new PropertyLabelProvider( ) );
		viewer.setInput( rootNode );
		return viewer.getTree( );
	}
	public void showSelectionPage( PropertyNode selectedNode )
	{
		showPage = showPage( selectedNode );
		if ( !showPage )
		{
			processSelection = false;
			viewer.setSelection( new StructuredSelection( currentNode ) );
		}
	}
	private final Composite createPropertyPane( Composite parent )