Fix infinite loading spinner for badges that have not been granted yet.

app/assets/javascripts/discourse/routes/badges_show_route.js

@@ -18,6 +18,7 @@ Discourse.BadgesShowRoute = Ember.Route.extend({
   setupController: function(controller, model) {
     Discourse.UserBadge.findByBadgeId(model.get('id')).then(function(userBadges) {
       controller.set('userBadges', userBadges);
+      controller.set('userBadgesLoaded', true);
     });
     controller.set('model', model);
   }

app/assets/javascripts/discourse/templates/badges/show.js.handlebars

@@ -22,6 +22,8 @@
       {{/link-to}}
     {{/each}}
   {{else}}
+    {{#unless userBadgesLoaded}}
       <div class='spinner'>{{i18n loading}}</div>
+    {{/unless}}
   {{/if}}
 </div>