Tutorial improvements

- Skip the build-related tutorial steps when builds are disabled
- Make the styling of the tutorial more consistent with the new layout

static/directives/angular-tour-ui.html

@@ -14,7 +14,7 @@
       </div>
     </div>
 
-    <div class="controls">
+    <div class="controls" ng-show="(hasNextStep && !step.signal) || (!hasNextStep && !inline)">
       <button class="btn btn-primary" ng-click="next()" ng-show="hasNextStep && !step.signal">Next</button>
       <button class="btn btn-primary" ng-click="stop()" ng-show="!hasNextStep && !inline">Done</button>
     </div>