method wasn't called onclick

frontend-js/src/main/js/gui/leftPanel/GuiUtils.js

@@ -981,7 +981,7 @@ GuiUtils.prototype.createTabMenuObject = function (params) {
     onclick: function () {
       $(navLink).tab('show');
       if (params.onclick) {
-        return params.onclick;
+        return params.onclick();
       }
     },
     xss: false