Bug 120068 TOC Item Expression is added automatically when adding the group key
Description: TOC Item Expression is added automatically when adding the group key Steps to reproduce: 1.Add a table binding with the dataset 2.Choose the table, add a group(say goupkey:row["CUSTOMERNUMBER"]) 3.Click "group" to invoke "Edit Group" dialog Expected result: Nothing in TOC Item Expression Actual result: The group key (row["CUSTOMERNUMBER"]) is added to the TOC Item Expression
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
layout.marginHeight = 0;
		tocArea.setLayout( layout );
		
		exprEditor = new Text( tocArea, SWT.SINGLE | SWT.BORDER );
		exprEditor.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		Button exprButton = new Button( tocArea, SWT.PUSH );
		exprButton.setText( "..." ); 
		exprButton.addSelectionListener( new SelectionListener( ) {
			public void widgetSelected( SelectionEvent event )
			{
				openExpression( );
			}
			public void widgetDefaultSelected( SelectionEvent e )
			{
			}
		} );
	}
	private void openExpression( )
	{
		ExpressionBuilder expressionBuilder = new ExpressionBuilder( exprEditor.getText( ) );
		if ( expressionBuilder.open( ) == OK )
		{
			exprEditor.setText( expressionBuilder.getResult( ) );
		}
	}
	/**
	 * Creates the title area
	 * 
	 * @param parent
	 *            the parent composite