Bug 121287 Post BIRT M3 build: Edit Group Dialog does not present expression builder for Group On
In Edit Group dialog, there is no expression builder for the Group On field. In order to support multi-pass aggregation, the expression builder is needed to specify an expression to group on.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
}
	/**
	 * Sets the model input.
	 * 
	 * @param input
	 */
	public void setInput( Object input )
	{
		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( ) );