Fix submit button text for Admin Notifications admin form

In Madrid, the button text didn't change depending on whether the form
is for the "new" page or for the "edit" page.

In consul, the buttons texts were "create admin notification" and
"update admin notification" instead of "create notification" and "update
notification".

Also change translation key from "submit" to "submit_button" to
match other instances.

app/views/admin/admin_notifications/_form.html.erb

@@ -8,6 +8,7 @@
   <%= f.text_area :body %>
 
   <div class="margin-top">
-    <%= f.submit class: "button success" %>
+    <%= f.submit t("admin.admin_notifications.#{admin_submit_action(@admin_notification)}.submit_button"),
+                 class: "button success" %>
   </div>
 <% end %>

config/i18n-tasks.yml

@@ -145,6 +145,7 @@ ignore_unused:
   - 'admin.settings.index.features.*'
   - 'admin.polls.*.submit_button'
   - 'admin.booths.*.submit_button'
+  - 'admin.admin_notifications.*.submit_button'
   - 'admin.homepage.*'
   - 'moderation.comments.index.filter*'
   - 'moderation.comments.index.order*'

config/locales/en/admin.yml

@@ -658,8 +658,10 @@ en:
         empty_notifications: There are no notifications to show
       new:
         section_title: New notification
+        submit_button: Create notification
       edit:
         section_title: Edit notification
+        submit_button: Update notification
       show:
         section_title: Notification preview
         send: Send notification

config/locales/es/admin.yml

@@ -659,8 +659,10 @@ es:
         empty_notifications: No hay notificaciones para mostrar
       new:
         section_title: Nueva notificación
+        submit_button: Crear notificación
       edit:
         section_title: Editar notificación
+        submit_button: Actualizar notificación
       show:
         section_title: Vista previa de notificación
         send: Enviar notificación

spec/features/admin/admin_notifications_spec.rb

@@ -75,7 +75,7 @@ feature "Admin Notifications" do
                                     body: 'This is a body',
                                     link: 'http://www.dummylink.dev')
 
-    click_button "Create Admin notification"
+    click_button "Create notification"
 
     expect(page).to have_content "Notification created successfully"
     expect(page).to have_content "Proposal authors"
@@ -99,7 +99,7 @@ feature "Admin Notifications" do
                                       body: 'Other body',
                                       link: '')
 
-      click_button "Update Admin notification"
+      click_button "Update notification"
 
       expect(page).to have_content "Notification updated successfully"
       expect(page).to have_content "All users"
@@ -171,7 +171,7 @@ feature "Admin Notifications" do
   scenario 'Errors on create' do
     visit new_admin_admin_notification_path
 
-    click_button "Create Admin notification"
+    click_button "Create notification"
 
     expect(page).to have_content error_message
   end
@@ -181,7 +181,7 @@ feature "Admin Notifications" do
     visit edit_admin_admin_notification_path(notification)
 
     fill_in :admin_notification_title, with: ''
-    click_button "Update Admin notification"
+    click_button "Update notification"
 
     expect(page).to have_content error_message
   end
@@ -228,7 +228,7 @@ feature "Admin Notifications" do
       visit new_admin_admin_notification_path
 
       fill_in_admin_notification_form(segment_recipient: segment_recipient)
-      click_button "Create Admin notification"
+      click_button "Create notification"
 
       expect(page).to have_content(I18n.t("admin.segment_recipient.#{user_segment}"))
     end