Bug 210241 Axis title should be horizontal to Axis by default when select Flip Axis.
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/wizard/TaskSelectType.java
* Updates the dimension combo according to chart type and axes number
	 * 
	 * @param sSelectedType
	 *            Chart type
	 * @return whether the dimension is changed after updating
	 */
	private boolean updateDimensionCombo( String sSelectedType )
	{
		
		boolean isOldExist = false;
		
		IChartType chartType = (IChartType) htTypes.get( sSelectedType );
		String[] dimensionArray = chartType.getSupportedDimensions( );
		int axesNum = ChartUIUtil.getOrthogonalAxisNumber( chartModel );
		if ( sDimension == null )
		{
			
			sDimension = chartType.getDefaultDimension( );
			isOldExist = true;
		}
		cbDimension.removeAll( );
		for ( int i = 0; i < dimensionArray.length; i++ )
		{
			boolean isSupported = chartType.isDimensionSupported( dimensionArray[i],
					axesNum,
					0 );
			if ( isSupported )
			{
				cbDimension.add( dimensionArray[i] );
			}