allow hiding help-button for first ng workflow step

we have merged patch that will hide the help-button on
workflow steps if helpUrl is not defined
https://review.openstack.org/#/c/299705/

However, it forgot to factor in the 'first' step.
With this patch, you can see it used on its parent patch:
Create Volume action removed the helpUrl and the
helpBtn doesn't show up either.

Change-Id: I7e3ee4d03b9f5f1fa924d7f233e4fa4ea4ed12a7

horizon/static/framework/widgets/wizard/wizard.controller.js

@@ -78,15 +78,8 @@
         from: $scope.currentIndex,
         to: index
       });
-      /**
+      toggleHelpBtn(index);
-       * Toggle help icon button if a step's helpUrl is not defined
-       */
       /*eslint-disable angular/controller-as */
-      if (angular.isUndefined(steps[index].helpUrl)) {
-        $scope.hideHelpBtn = true;
-      } else {
-        $scope.hideHelpBtn = false;
-      }
       $scope.currentIndex = index;
       $scope.openHelp = false;
       /*eslint-enable angular/controller-as*/
@@ -119,12 +112,24 @@
 
     function onInitSuccess() {
       $scope.$broadcast(wizardEvents.ON_INIT_SUCCESS);
+      if (steps.length > 0) {
+        toggleHelpBtn(0);
+      }
     }
 
     function onInitError() {
       $scope.$broadcast(wizardEvents.ON_INIT_ERROR);
     }
 
+    function toggleHelpBtn(index) {
+      // Toggle help icon button if a step's helpUrl is not defined
+      if (angular.isUndefined(steps[index].helpUrl)) {
+        $scope.hideHelpBtn = true;
+      } else {
+        $scope.hideHelpBtn = false;
+      }
+    }
+
     /**
      * Each step in the workflow can provide an optional `checkReadiness`
      * method, which should return a promise. When this method is provided
@@ -186,7 +191,7 @@
         }
       });
 
-      viewModel.ready = (stepReadyPromises.length === 0);
+      viewModel.ready = stepReadyPromises.length === 0;
       return $q.all(stepReadyPromises);
     }
 

horizon/static/framework/widgets/wizard/wizard.spec.js

@@ -69,7 +69,7 @@
         steps: [ {}, {}, {} ]
       };
       $scope.$apply();
-      expect(angular.element(element).find('.help-toggle').hasClass('ng-hide')).toBe(false);
+      expect(angular.element(element).find('.help-toggle').hasClass('ng-hide')).toBe(true);
 
       $scope.workflow.steps[1] = {};
       $scope.switchTo(1);