modebar can't be hidden with multiple traces #56
Description
It looks like the mode bar can't be hidden in line charts with more than one trace (though it works fine for single trace charts).
Here's a minimal example:
<html>
<body>
<div id="plotly-div"></div>
<script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
<script>
var trace1 = { x: [0, 1], y: [4, 5], type: "scatter"};
var trace2 = { x: [0, 1], y: [4, 5], type: "scatter"};
//var data = [trace1]; // This works: the mode bar gets removed.
var data = [trace1, trace2]; // This doesn't work: the mode bar remains.
Plotly.plot('plotly-div', data, {}, { displayModeBar: false });
</script>
</body>
</html>
I looked through the code a bit and thought that perhaps this has something to do with this comment.