Bootstrapping Devise Edit Registration View on Rails 4.2.0 with Bootstrap 3

devise_registrations_edit.html.erb

<div class="container">
  <div class="row">
    <div class="col-sm-4 col-sm-offset-4">
      <div class="light-well">
        <h2 class="page-header text-center">Edit <%= resource_name.to_s.humanize %></h2>

        <%= form_for resource, as: resource_name, url: registration_path(resource_name), html: { method: :put },
                      html: { class: "form-horizontal center"} do |f| %>

          <div class="form-group">
            <%= f.email_field :email, autofocus: true, class: "form-control" %>
          </div>

          <% if devise_mapping.confirmable? && resource.pending_reconfirmation? %>
            <div>Currently waiting confirmation for: <%= resource.unconfirmed_email %></div>
          <% end %>

          <div class="form-group">
            <%= f.password_field :password, autocomplete: "off", placeholder: "New Password", class: "form-control" %>
            <p class="help-block"><i>leave blank if you don't want to change it</i><br />
          </div>

          <div class="form-group">
            <%= f.password_field :password_confirmation, autocomplete: "off", placeholder: "Confirm New Password", class: "form-control" %>
            <% if @validatable %>
              <p class="help-block"><%= @minimum_password_length %> characters minimum</p>
            <% end %>
          </div>

          <div class="form-group">
            <%= f.password_field :current_password, autocomplete: "off", placeholder: "Current Password", class: "form-control" %>
            <p class="help-block"><i>we need your current password to confirm your changes</i><br />
          </div>

          <div class="actions">
            <%= f.submit "Update", class: "btn btn-success btn-lg btn-block" %>
          </div>
          <%= devise_error_messages! %>
        <% end %>
      </div>
      <br>
      <br>
      <h3 class="page-header text-center">Cancel my account</h3>
      <p>Unhappy? <%= button_to "Delete my account", registration_path(resource_name), class: "btn btn-danger btn-lg btn-block", data: { confirm: "Are you sure?" }, method: :delete %></p>
      <%= link_to "Back", :back %>
    </div>
  </div>
</div>