Adapt routes and helpers to make view spec green

app/views/spree/admin/orders/_filters.html.haml

@@ -1,5 +1,5 @@
 %div{"data-hook" => "admin_orders_index_search"}
-  = form_tag :admin_orders, {name: "orders_form", "ng-submit" => "fetchResults()"} do
+  = form_tag spree.admin_orders_url, {name: "orders_form", "ng-submit" => "fetchResults()"} do
     .field-block.alpha.four.columns
       .date-range-filter.field
         = label_tag nil, t(:date_range)

app/views/spree/admin/orders/index.html.haml

@@ -3,7 +3,7 @@
 
 - content_for :page_actions do
   %li
-    = button_link_to t('.new_order'), new_admin_order_url, icon: 'icon-plus', id: 'admin_new_order'
+    = button_link_to t('.new_order'), spree.new_admin_order_url, icon: 'icon-plus', id: 'admin_new_order'
 
 = render partial: 'spree/admin/shared/order_sub_menu'
 

spec/views/spree/admin/orders/index.html.haml_spec.rb

@@ -3,6 +3,9 @@
 require "spec_helper"
 
 describe "spree/admin/orders/index.html.haml" do
+  helper Spree::Admin::NavigationHelper
+  helper EnterprisesHelper
+
   around do |example|
     original_config = Spree::Config[:enable_invoices?]
     example.run