Make features/admin/subscriptions_spec and shopworkflow work with selenium

Also, remove a test support method, dead code

spec/features/admin/subscriptions_spec.rb

@@ -70,7 +70,7 @@ feature 'Subscriptions' do
         # Viewing Products
         within "tr#so_#{subscription.id}" do
           expect(page).to have_selector "td.items.panel-toggle", text: 3
-          page.find("td.items.panel-toggle").trigger('click')
+          page.find("td.items.panel-toggle").click
         end
 
         within "#subscription-line-items" do

spec/support/request/shop_workflow.rb

@@ -25,7 +25,7 @@ module ShopWorkflow
   end
 
   def toggle_accordion(name)
-    find("dd a", text: name).trigger "click"
+    find("dd a", text: name).click
   end
 
   def add_variant_to_order_cycle(exchange, variant)