Fieldmap: reimplement d3 rebind

clicking on a plot is not working!

js/source/entries/fieldmap.js

@@ -412,7 +412,24 @@ export function init() {
                     }
                 });
             };
-            return d3.rebind(cc, event, 'on');
+            return _rebind(cc, event, 'on');
+
+            // Copies a variable number of methods from source to target.
+            function _rebind(target, source) {
+                var i = 1, n = arguments.length, method;
+                while (++i < n) target[method = arguments[i]] = d3_rebind(target, source, source[method]);
+                return target;
+            };
+
+            // Method is assumed to be a standard D3 getter-setter:
+            // If passed with no arguments, gets the value.
+            // If passed with arguments, sets the value and returns the target.
+            function d3_rebind(target, source, method) {
+                return function() {
+                    var value = method.apply(source, arguments);
+                    return arguments.length ? target : value;
+                };
+            }
         }
 
         heatmap_plot_click(plot, heatmap_object, trait_name) {