Fix up recovery codes design a little (#1866)

app/views/settings/two_factor_auths/_recovery_codes.html.haml

@@ -1,6 +1,5 @@
 %p.hint= t('two_factor_auth.recovery_instructions')
 
-%h3= t('two_factor_auth.recovery_codes')
 %ol.recovery-codes
   - @codes.each do |code|
     %li

app/views/settings/two_factor_auths/show.html.haml

@@ -10,6 +10,8 @@
     = link_to t('two_factor_auth.setup'), new_settings_two_factor_auth_path, class: 'block-button'
 
 - if current_user.otp_required_for_login
+  %p
+
   .simple_form
     %p.hint= t('two_factor_auth.lost_recovery_codes')
     = link_to t('two_factor_auth.generate_recovery_codes'), recovery_codes_settings_two_factor_auth_path, data: { method: 'POST' }, class: 'block-button'