title: ToolTip in ZedGraph refreshes continuously and uses a significant amount of CPU
body: <p>I am using ZedGraph to show Japanese candles.  I set the GraphPane.isShowPointValue=true, but when I move my mouse on the candle, the tooltip is refreshing and refreshing.</p>
  
  <p>I find that when the tooltip is shown, it always takes more than 50% CPU time.</p>
  
  <p>How can I solve this?</p>