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
/**
	 * The include check box and sorting direction radio box
	 */
	private Button includeHeader, includeFooter, ascending, descending;
	private Text exprEditor;
	private String oldExpr;
	final private static IChoice[] intervalChoices = DesignEngine.getMetaDataDictionary( )
			.getChoiceSet( DesignChoiceConstants.CHOICE_INTERVAL )
			.getChoices( );
	final private static IChoice sortByAscending = DesignEngine.getMetaDataDictionary( )
			.getChoiceSet( DesignChoiceConstants.CHOICE_SORT_DIRECTION )
			.findChoice( DesignChoiceConstants.SORT_DIRECTION_ASC );
	final private static IChoice sortByDescending = DesignEngine.getMetaDataDictionary( )
			.getChoiceSet( DesignChoiceConstants.CHOICE_SORT_DIRECTION )
			.findChoice( DesignChoiceConstants.SORT_DIRECTION_DESC );
	final private static String SORT_GROUP_TITLE = DEUtil.getPropertyDefn( ReportDesignConstants.TABLE_GROUP_ELEMENT,
			GroupHandle.SORT_DIRECTION_PROP )
			.getDisplayName( );
	/**
	 * Constructor.
	 * 
	 * @param parentShell
	 */
	public GroupDialog( Shell parentShell, String title )
	{
		super( parentShell, title );
	}
	/*
	 * (non-Javadoc)
	 *