Use history.back() when a petition isn't moderated

We can't redirect to the admin petition show page since it shows
the moderation form by default and attempts to lock the petition
again. In this case use window.history.back() instead.

app/assets/javascripts/edit_lock.js

@@ -1,7 +1,7 @@
 (function ($) {
   'use strict';
 
-  $.fn.editLock = function(id, user_id, path) {
+  $.fn.editLock = function(id, user_id, path, moderated) {
     var $html = this;
     var $message = $html.find('.edit-lock-message');
     var $override = $html.find('#edit-lock-override');
@@ -12,6 +12,7 @@
     var PATH = path;
     var INTERVAL = 10000;
     var LOCK_URL = PATH + '/' + ID + '/lock.json';
+    var MODERATED = moderated;
 
     var EditLock = {
       processStatus: function(data) {
@@ -59,7 +60,11 @@
       },
 
       cancelClicked: function(e) {
-        window.location = PATH + '/' + ID;
+        if (MODERATED) {
+          window.location = PATH + '/' + ID;
+        } else {
+          window.history.back();
+        }
       }
     };
 

app/views/admin/admin/_edit_lock.html.erb

@@ -13,9 +13,9 @@
 <script>
   $(document).ready(function() {
     <% if @petition.is_a?(::Archived::Petition) %>
-      $("#edit-lock").editLock(<%= @petition.id %>, <%= current_user.id %>, '/admin/archived/petitions');
+      $("#edit-lock").editLock(<%= @petition.id %>, <%= current_user.id %>, '/admin/archived/petitions', true);
     <% else %>
-      $("#edit-lock").editLock(<%= @petition.id %>, <%= current_user.id %>, '/admin/petitions');
+      $("#edit-lock").editLock(<%= @petition.id %>, <%= current_user.id %>, '/admin/petitions', <%= @petition.moderated? %>);
     <% end %>
   });
 </script>