Add Create Topic button to /categories page

app/assets/javascripts/discourse/models/category_list.js

@@ -36,6 +36,7 @@ Discourse.CategoryList.reopenClass({
     return Discourse.ajax("/" + filter + ".json").then(function(result) {
       var categoryList = Discourse.TopicList.create();
       categoryList.set('can_create_category', result.category_list.can_create_category);
+      categoryList.set('can_create_topic', result.category_list.can_create_topic);
       categoryList.set('categories', route.categoriesFrom(result));
       categoryList.set('loaded', true);
       return categoryList;

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

@@ -25,6 +25,7 @@ Discourse.ListCategoriesRoute = Discourse.Route.extend({
         controller: 'listCategories'
       });
       listController.set('canCreateCategory', categoryList.get('can_create_category'));
+      listController.set('canCreateTopic', categoryList.get('can_create_topic'));
       listController.set('category', null);
       _this.controllerFor('listCategories').set('content', categoryList);
     });

app/serializers/category_list_serializer.rb

@@ -1,6 +1,6 @@
 class CategoryListSerializer < ApplicationSerializer
 
-  attributes :can_create_category
+  attributes :can_create_category, :can_create_topic
 
   has_many :categories, serializer: CategoryDetailedSerializer, embed: :objects
 
@@ -8,4 +8,8 @@ class CategoryListSerializer < ApplicationSerializer
     scope.can_create?(Category)
   end
 
+  def can_create_topic
+    scope.can_create?(Topic)
+  end
+
 end