Remove all event listeners from gd

Author: mdtusz

src/plot_api/plot_api.js

@@ -941,6 +941,7 @@ Plotly.redraw = function(gd) {
 Plotly.newPlot = function (gd, data, layout, config) {
     gd = getGraphDiv(gd);
     plots.purge(gd);
+    gd.removeAllListeners();
     return Plotly.plot(gd, data, layout, config);
 };