Bug 103291 Group key doesn't support inputting text
Description: Group key doesn't support inputting text Steps to reproduce: 1.Add a table and bind it with data set 2.Add a group to the table: enter a row name in the "Group On:" textbox 3.Save and preview Expected result: Everything is OK Actual result: Error occurs because the group key is added as a string not a expression
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
{
		Assert.isTrue( input instanceof GroupHandle );
		inputGroup = (GroupHandle) input;
	}
	/**
	 * Sets the dataset list to use.
	 * 
	 * @param dataSetList
	 */
	public void setDataSetList( List dataSetList )
	{
		this.dataSetList = dataSetList;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.dialogs.Dialog#okPressed()
	 */
	protected void okPressed( )
	{
		try
		{
			inputGroup.setName( nameEditor.getText( ) );
			int index = keyChooser.getSelectionIndex( );
			String oldKey = inputGroup.getKeyExpr( );
			String newKey = null;
			if ( index == -1 )
			{
				newKey = keyChooser.getText( );
			}