Bug 137142 Type in chart interactivity doesn't work.
Description: Type in chart interactivity doesn't work. Steps to reproduce 1. Insert a chart. 2. Set Title interactivity or other interactivity, set type to Mouse click, set Action Show Tooltip. 3. Preview. Expected result: When click mouse, tooltip shows. Actual result: When mouse moved over, tooltip showed.
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGInteractiveRenderer.java
Element primGroup = svg_g2d.createElement( "g" ); 
					svg_g2d.pushParent( primGroup );
					primGroup.setAttribute( "id", groupIdentifier + "_" + idTemp ); 
					primGroup.setAttribute( "style", "visibility:visible;" ); 
					svg_g2d.setDeferStrokColor( primGroup );
				}
			}
		}
	}
	/**
	 * UnGroups the svg drawing instructions that represents this primitive
	 * events.
	 * 
	 * @param pre
	 *            primitive render event
	 * @param drawText
	 *            TODO
	 */
	protected void ungroupPrimitive( PrimitiveRenderEvent pre, boolean drawText )
	{
		if ( _iun == null )
		{
			logger.log( ILogger.WARNING,
					Messages.getString( "exception.missing.component.interaction", getULocale( ) ) ); 
			return;
		}
		
		if ( pre.getSource( ) instanceof StructureSource )