Bug 189751 cube enhancement: Groups and Summaries category; an empty summary field is being created.
Based on bug Id# 187412: Cube builder enhancement While reviewing the cube builder enhancements, I found some things that are not updated as the mock up. Please see the attached document. Under Groups and summaries category: 1. If new a cube, under 'groups and Summaries' category, by default an empty summary field is being created. No empty groups and summaries should be there to start with. Make it consistent as 'Groups (dimension): no empty group is there. 2. The category title should repeats itself as Groups and Summaries 3. Primary Dataset has to be listed as (Primary)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ElementFactory.java
* 
	 * @param baseElement
	 *            the base element.
	 * @param name
	 *            the optional new element name
	 * @return the handle to the new element.
	 * @throws ExtendsException
	 *             if the the base element is in a library that is not included
	 *             in this module, or if the "extends" relationship is illegal
	 */
	public DesignElementHandle newElementFrom( DesignElementHandle baseElement,
			String name ) throws ExtendsException
	{
		if ( baseElement == null )
			return null;
		
		if ( baseElement.getRoot( ).getElement( ) == module )
			return newElementFrom( name, baseElement );
		
		
		Module root = (Module) baseElement.getRoot( ).getElement( );
		if ( root instanceof Library )
		{
			
			Library lib = module.getLibraryByLocation( root.getLocation( ) );
			if ( lib == null )
			{
				throw new InvalidParentException(
						null,
						baseElement.getElement( ),