singleton refactored (so IDE can follow types)

frontend-js/src/main/js/GuiConnector.js

@@ -30,6 +30,8 @@ function GuiConnector() {
 GuiConnector.prototype = Object.create(ObjectWithListeners.prototype);
 GuiConnector.prototype.constructor = GuiConnector;
 
+var singleton = new GuiConnector();
+
 /**
  *
  * @param {GuiConnector} object
@@ -37,7 +39,7 @@ GuiConnector.prototype.constructor = GuiConnector;
  */
 function returnThisOrSingleton(object) {
   if (object === undefined || object === null) {
-    return GuiConnector.singleton;
+    return singleton;
   } else {
     return object;
   }
@@ -566,6 +568,5 @@ GuiConnector.prototype.warn = function (message) {
   $(self._warnDialog).dialog("open");
 };
 
-GuiConnector.singleton = new GuiConnector();
 
-module.exports = GuiConnector.singleton;
+module.exports = singleton;