[FIX] web_graph: Adding to dashboard a customized view

When reading customized views from our dashbord in reporting,
the measures selected in the customized views were not taken into
account. It happened when the customized view was build from a report.

opw:698105

addons/web_graph/static/src/js/graph_view.js

@@ -83,6 +83,10 @@ instance.web_graph.GraphView = instance.web.View.extend({
             groupbys = this.get_groupbys_from_searchview(),
             col_group_by = groupbys.col_group_by,
             measures = groupbys.measures;
+        // Do not forward-port
+        if(measures.length === 0 && context.measures) {
+            measures = context.measures;
+        }
 
         if (!this.graph_widget) {
             this.widget_config.context = _.clone(context);