title: JQplot hide serie by clicking on its legend name : tooltip always displayed
body: <p>I am using JQPlot with <a href="http://www.jqplot.com/docs/files/plugins/jqplot-enhancedLegendRenderer-js.html" rel="nofollow">legend plugin</a> to toggle series displaying by clicking on its legends names.</p>
  
  <pre><code>    legend: {
          show: true,
          placement: 'outsideGrid',
          renderer: $.jqplot.EnhancedLegendRenderer
      }
  </code></pre>
  
  <p>It is working, but the serie tooltip is always displayed when the serie is hidden. It is an issue if you have plenty of series and you want hide all but one : all tooltip of the hidden series are displayed on mouse over.</p>
  
  <p>Here is a fiddle to explain the problem : <a href="http://jsfiddle.net/Bouillou/WdLnm/284/" rel="nofollow">http://jsfiddle.net/Bouillou/WdLnm/284/</a></p>