tooltip location with Shiny

I have a wordcloud in Shiny and the tooltips are always way below the cursor. It seems like it is a standard gap too.

I edited d3wordcloud.js to change the "top" setting in function mousemove, but that did not work.

```
function mousemove(d){
tooltip
.style("left", (d3.event.pageX + 0 ) + "px")
.style("top", (d3.event.pageY + **0**) + "px");
}
```

How can I have the tooltip hover properly like found here: http://rstudio-pubs-static.s3.amazonaws.com/133106_df80b0877cfe45f2b8f06c03c60ffcab.html#tooltips

Is there a different location where I can change the top setting?