Move error summary on edit user page outside form

This is more consistent with what we're doing on other similar pages,
particularly ones that have been changed to use the GOV.UK Design
System, so I think this will help with subsequent changes.

app/views/users/edit.html.erb

@@ -40,20 +40,19 @@
   </p>
 <% end %>
 
-<%= form_for @user, :html => {:class => 'well add-top-margin'} do |f| %>
-
-  <% if @user.errors.count > 0 %>
-    <div class="govuk-error-summary alert alert-danger" aria-labelledby="error-summary-title" role="alert" tabindex="-1" data-module="error-summary">
-      <div class="govuk-error-summary__body">
-        <ul class="govuk-list govuk-error-summary__list">
-          <% @user.errors.full_messages.each do |message| %>
-            <%= content_tag :li, message %>
-          <% end %>
-        </ul>
-      </div>
+<% if @user.errors.count > 0 %>
+  <div class="govuk-error-summary alert alert-danger" aria-labelledby="error-summary-title" role="alert" tabindex="-1" data-module="error-summary">
+    <div class="govuk-error-summary__body">
+      <ul class="govuk-list govuk-error-summary__list">
+        <% @user.errors.full_messages.each do |message| %>
+          <%= content_tag :li, message %>
+        <% end %>
+      </ul>
     </div>
-  <% end %>
+  </div>
+<% end %>
 
+<%= form_for @user, :html => {:class => 'well add-top-margin'} do |f| %>
   <%= render partial: "form_fields", locals: { f: f } %>
 
   <hr>