Bug 176557 Bubble charts labels not positionned correctly
Create a bubble chart Show the series labels 1- the labels are overlapping the chart, when they are above, below,... Some bubbles might have the label inside, some outside, depending on their size. If above is select, the label should be above (and outside) the bubble, regardless of the size. Same thing for any marker type. 2- We need another choice to show the labels inside the bubble (so it would be centered in the bubble).
chart/org.eclipse.birt.chart.ui/src/org/eclipse/birt/chart/ui/util/ChartUIUtil.java
else if ( chart instanceof ChartWithoutAxes )
		{
			return ( (SeriesDefinition) ( (ChartWithoutAxes) chart ).getSeriesDefinitions( )
					.get( 0 ) ).getSeriesDefinitions( );
		}
		return null;
	}
	/**
	 * Return specified axis definitions or all series definitions. Remember
	 * return type is ArrayList, not EList, no event is fired when adding or
	 * removing an element.
	 * 
	 * @param chart
	 *            chart
	 * @return specified axis definitions or all series definitions
	 */
	public static List getAllOrthogonalSeriesDefinitions( Chart chart )
	{
		List seriesList = new ArrayList( );
		if ( chart instanceof ChartWithAxes )
		{
			EList axisList = ( (Axis) ( (ChartWithAxes) chart ).getAxes( )
					.get( 0 ) ).getAssociatedAxes( );
			for ( int i = 0; i < axisList.size( ); i++ )
			{
				seriesList.addAll( ( (Axis) axisList.get( i ) ).getSeriesDefinitions( ) );
			}
		}
		else if ( chart instanceof ChartWithoutAxes )
		{