Added margin between form and button in reset-password form.

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

@@ -2,6 +2,7 @@
   %h3.page-title Reset password
   .devise-errors
     = devise_error_messages!
+  .clearfix.append-bottom-20
     = f.email_field :email, placeholder: "Email",  class: "form-control", required: true
   .clearfix.append-bottom-10
     = f.submit "Reset password", class: "btn-primary btn"