Bug 192349 The column selected disappears when you reclick the downward arrow [0001]
Description: The column selected disappears when you reclick the downward arrow. Build number: 2.2.0.v20070613-1211 Steps to reproduce: 1, New a table binding to a data set, add an Aggregation, select one column from the "Data Field" dropdown list, click the downward arrow again. Expected result: The column selected is still there. Actual result: The column selected disappears. Error log: N/A
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
break;
				}
			}
			this.newBinding.setName( txtName.getText( ) );
			this.newBinding.setDisplayName( txtDisplayName.getText( ) );
			this.newBinding.setExpression( cmbDataField.getText( ) );
			this.newBinding.setAggregateFunction( getFunctionByDisplayName( cmbFunction.getText( ) ) );
			this.newBinding.setFilterExpression( txtFilter.getText( ) );
			if ( btnTable.getSelection( ) )
			{
				this.newBinding.setAggregateOn( null );
			}
			else
			{
				this.newBinding.setAggregateOn( cmbGroup.getText( ) );
			}
			this.binding = DEUtil.addColumn( getBindingHolder( ),
					this.newBinding,
					true );
			for ( Iterator iterator = argsMap.keySet( ).iterator( ); iterator.hasNext( ); )
			{
				String arg = (String) iterator.next( );
				AggregationArgument argHandle = StructureFactory.createAggregationArgument( );
				argHandle.setName( getArgumentByDisplayName( this.binding.getAggregateFunction( ),
						arg ) );
				argHandle.setValue( ( (Text) argsMap.get( arg ) ).getText( ) );
				this.binding.addArgument( argHandle );
			}
		}
		else