Adds administrator id on admin administrators index page

app/views/admin/administrators/index.html.erb

@@ -8,12 +8,16 @@
 
     <table>
       <thead>
+        <th scope="col" class="text-center"><%= t("admin.administrators.index.id") %></th>
         <th scope="col"><%= t("admin.administrators.index.name") %></th>
         <th scope="col"><%= t("admin.administrators.index.email") %></th>
         <th scope="col" class="small-3"><%= t("admin.shared.actions") %></th>
       </thead>
       <% @administrators.each do |administrator| %>
         <tr>
+          <td class="text-center">
+            <%= administrator.id %>
+          </td>
           <td>
             <%= administrator.name %>
           </td>

config/locales/en/admin.yml

@@ -588,6 +588,7 @@ en:
         title: Administrators
         name: Name
         email: Email
+        id: Administrator ID
         no_administrators: There are no administrators.
       administrator:
         add: Add

config/locales/es/admin.yml

@@ -585,6 +585,7 @@ es:
     administrators:
       index:
         title: Administradores
+        id: ID de Administrador
         name: Nombre
         email: Email
         no_administrators: No hay administradores.

spec/features/admin/administrators_spec.rb

@@ -10,6 +10,7 @@ feature 'Admin administrators' do
   end
 
   scenario 'Index' do
+    expect(page).to have_content @administrator.id
     expect(page).to have_content @administrator.name
     expect(page).to have_content @administrator.email
     expect(page).not_to have_content @user.name