Bug 182661 Cross Tab: Need to support "New Data Cube" from menu bar
Please look at the UI mockup as reference to support "New Data Cube" on dropdown menu from Menu bar.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/DesignerActionBarContributor.java
/**
	 * Gets insert elements actions including extension points.
	 */
	private RegisterActions[] getInsertElementActions( )
	{
		if ( insertElementActions == null )
		{
			insertElementActions = insertActions;
			List extensionPoints = ExtensionPointManager.getInstance( )
					.getExtendedElementPoints( );
			
			PaletteEntryExtension[] entries = EditpartExtensionManager.getPaletteEntries( );
			
			if ( !extensionPoints.isEmpty( ) )
			{
				insertElementActions = new RegisterActions[insertActions.length
						+ extensionPoints.size( )
						+ entries.length];
				for ( int i = 0; i < insertActions.length; i++ )
				{
					insertElementActions[i] = insertActions[i];
				}
				for ( int k = 0; k < extensionPoints.size( ); k++ )
				{
					ExtendedElementUIPoint point = (ExtendedElementUIPoint) extensionPoints.get( k );
					IElementDefn extension = DEUtil.getMetaDataDictionary( )
							.getExtension( point.getExtensionName( ) );
					String displayName = new String( );
					displayName = extension.getDisplayName( );
					if ( displayName.equalsIgnoreCase( "Chart" ) )