[IMP] keeps the dropdown open when the user selects some measures in graph view (addon web_graph)

bzr revid: ged@openerp.com-20140117152413-ycktqzi51a3lhhz9

addons/web_graph/static/src/js/graph_widget.js

@@ -181,6 +181,7 @@ openerp.web_graph.Graph = openerp.web.Widget.extend(openerp.EventDispatcherMixin
 
     measure_selection: function (event) {
         event.preventDefault();
+        event.stopPropagation();
         var measure = event.target.attributes['data-choice'].nodeValue;
         this.pivot.toggle_measure(measure);
         this.put_measure_checkmarks();