Unify links to download documents in admin tables

We were using a "Download file" link in one place, while in another
place we had an additional column where the name of the document was a
link to download it.

app/views/admin/site_customization/documents/index.html.erb

@@ -13,7 +13,6 @@
         <th scope="col"><%= t("admin.shared.title") %></th>
         <th scope="col"><%= t("admin.documents.index.format") %></th>
         <th scope="col"><%= t("admin.documents.index.size") %></th>
-        <th scope="col"><%= t("admin.documents.index.url") %></th>
         <th scope="col"><%= t("admin.shared.actions") %></th>
       </tr>
     </thead>
@@ -23,15 +22,18 @@
           <td><%= document.title %></td>
           <td><%= document.attachment.content_type %></td>
           <td><%= number_to_human_size(document.attachment.byte_size) %></td>
-          <td><%= link_to document.title, document.attachment, target: :blank %></td>
           <td>
-            <div class="small-12 medium-6 column">
             <%= render Admin::TableActionsComponent.new(
               document,
               actions: [:destroy],
               destroy_path: admin_site_customization_document_path(document)
-              ) %>
-            </div>
+            ) do |actions| %>
+              <%= actions.action(:download,
+                                 text: t("documents.buttons.download_document"),
+                                 path: document.attachment,
+                                 target: "_blank",
+                                 rel: "nofollow") %>
+            <% end %>
           </td>
         </tr>
       <% end %>

config/locales/en/admin.yml

@@ -529,7 +529,6 @@ en:
         title: "Documents"
         format: "Format"
         size: "Size"
-        url: "URL"
       create:
         success_notice: "Document uploaded successfully"
         unable_notice: "Invalid document"

config/locales/es/admin.yml

@@ -529,7 +529,6 @@ es:
         title: "Documentos"
         format: "Formato"
         size: "Tamaño"
-        url: "URL"
       create:
         success_notice: "Documento creado correctamente"
         unable_notice: "Documento inválido"

spec/system/admin/site_customization/documents_spec.rb

@@ -23,7 +23,7 @@ describe "Documents", :admin do
     visit admin_site_customization_documents_path
 
     expect(page).to have_content "There are 3 documents"
-    expect(page).to have_link document.title, href: url
+    expect(page).to have_link "Download file", href: url
   end
 
   scenario "Index (empty)" do
@@ -58,7 +58,8 @@ describe "Documents", :admin do
     click_button "Upload"
 
     expect(page).to have_content "Document uploaded successfully"
-    expect(page).to have_link "logo.pdf"
+
+    within("tr", text: "logo.pdf") { expect(page).to have_link "Download file" }
   end
 
   scenario "Errors on create" do