Adds styles and texts for direct messages mailer

app/views/mailer/direct_message.html.erb

@@ -6,4 +6,18 @@
   <p style="font-family: 'Open Sans','Helvetica Neue',arial,sans-serif;font-size: 14px;font-weight: normal;line-height: 24px;">
     <%= @direct_message.body %>
   </p>
-</td>
+
+  <table style="width: 100%; border-top: 1px solid #DEE0E3; margin-top: 60px;">
+    <tbody>
+      <tr>
+        <td style="padding-bottom: 12px; padding-top: 24px; text-align: center;">
+          <%= link_to user_path(@direct_message.sender_id), style: "font-family: 'Open Sans','Helvetica Neue',arial,sans-serif; background: #f7f5f2; border-radius: 6px; color: #3d3d66!important; font-weight: bold; margin: 0px; padding: 10px 15px; text-align: center; text-decoration: none; min-width: 200px; display: inline-block;", target: "_blank" do %>
+            <%= image_tag('icon_mailer_reply.png', style: "border: 0; display: inline-block; width: 100%; max-width: 12px; vertical-align: sub;", alt: "") %>
+            <%= t('mailers.direct_message.reply',
+                sender: @direct_message.sender.name) %>
+          <% end %>
+        </td>
+      </tr>
+    </tbody>
+  </table>
+</td>

config/locales/mailers.en.yml

@@ -32,4 +32,6 @@ en:
       unfeasible_html: "From the Madrid City Council we want to thank you for your participation in the <strong>participatory budgets of the city of Madrid</strong>. We regret to inform you that your proposal <strong>'%{title}'</strong> will be excluded from this participatory process for the following reason:"
     proposal_notification:
       share: Share
-      comment: Comment proposal
+      comment: Comment proposal
+    direct_message:
+      reply: Reply to %{sender}

config/locales/mailers.es.yml

@@ -32,4 +32,6 @@ es:
       unfeasible_html: "Desde el Ayuntamiento de Madrid queremos agradecer tu participación en los <strong>Presupuestos Participativos de la ciudad de Madrid</strong>. Lamentamos informarte de que tu propuesta <strong>'%{title}'</strong> quedará excluida de este proceso participativo por el siguiente motivo:"
     proposal_notification:
       share: Compartir
-      comment: Comentar propuesta
+      comment: Comentar propuesta
+    direct_message:
+      reply: Responder a %{sender}