Add submit button to the top of preferences pages (#13068)

* Move submit button to the top of the edit page

* Duplicate save button on long form

* Fix click submit on profile spec

app/views/settings/preferences/notifications/show.html.haml

@@ -1,7 +1,10 @@
 - content_for :page_title do
   = t('settings.notifications')
 
-= simple_form_for current_user, url: settings_preferences_notifications_path, html: { method: :put } do |f|
+- content_for :heading_actions do
+  = button_tag t('generic.save_changes'), class: 'button', form: 'edit_notification'
+
+= simple_form_for current_user, url: settings_preferences_notifications_path, html: { method: :put, id: 'edit_notification' } do |f|
   = render 'shared/error_messages', object: current_user
 
   %h4= t 'notifications.email_events'
@@ -32,6 +35,3 @@
       = ff.input :must_be_follower, as: :boolean, wrapper: :with_label
       = ff.input :must_be_following, as: :boolean, wrapper: :with_label
       = ff.input :must_be_following_dm, as: :boolean, wrapper: :with_label
-
-  .actions
-    = f.button :button, t('generic.save_changes'), type: :submit