Style resend confirmation instructions

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/devise/confirmations/new.html.erb

-<h2>Resend confirmation instructions</h2>
-
-<%= form_for(resource, as: resource_name, url: confirmation_path(resource_name), html: { method: :post }) do |f| %>
-  <%= devise_error_messages! %>
-
-  <div><%= f.label :email %><br />
-  <%= f.email_field :email %></div>
-
-  <div><%= f.submit "Resend confirmation instructions" %></div>
-<% end %>
-
-<%= render partial: "devise/shared/links" %>

app/views/devise/confirmations/new.html.haml

+.login-box
+  %h3.page-title Resend confirmation instructions
+  = form_for(resource, as: resource_name, url: confirmation_path(resource_name), html: { method: :post }) do |f|
+    = devise_error_messages!
+    = f.email_field :email, placeholder: 'Email'
+    %div= f.submit "Resend confirmation instructions", class: 'btn btn-success'
+  %hr
+  = link_to "Sign in", new_session_path(resource_name)