Refactor admin settings, add all service settings

app/views/admin/settings/registrations/index.html.erb

@@ -4,14 +4,9 @@
   <%= form_for(Setting.new, url: admin_settings_registrations_path) do |f| %>
     <section>
       <h3>Registrations</h3>
+
       <% if @errors && @errors.any? %>
-        <div>
-          <ul>
-            <% @errors.full_messages.each do |msg| %>
-              <li><%= msg %></li>
-            <% end %>
-          </ul>
-        </div>
+        <%= render partial: "admin/settings/errors", locals: { errors: @errors } %>
       <% end %>
 
       <label class="block">
@@ -29,7 +24,7 @@
     </section>
 
     <section>
-      <p class="pt-6 border-t border-gray-200">
+      <p class="pt-6 border-t border-gray-200 text-right">
         <%= f.submit 'Save', class: "btn-md btn-blue w-full md:w-auto" %>
       </p>
     </section>